9 Best Sliding Glass Dog Door Inserts (October 2026)
The best sliding glass dog door inserts include the PetSafe Sliding Glass Dog Door for taller patio doors, the PetSafe 1-Piece Sliding Glass Dog Door for small-to-medium pets, and the VEVOR Sliding Glass Dog Door for a metal flap cover.
On this page (3 sections)
The PetSafe 1-Piece Sliding Glass Dog Door, Large is the best sliding glass dog door insert for most large dogs with a taller patio track. Its assembled panel adjusts from 91 7/16 to 96 in, while smaller pets and standard-height doors have better-fitting options below.
Start by measuring the track, then compare the flap opening with your dog's chest width and shoulder height. A panel insert avoids cutting into the door, but it also occupies part of the opening people use.
For more sizing help, read our guide to measuring your dog and door for a pet door. If you are still deciding whether an insert suits your home, see whether a dog door can be installed in a glass door.
Our picks at a glance
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1
Best for taller patio doorsPetSafe Sliding Glass Dog Door, 96 in Tall, Large
8.6/10 our score
See it on Amazon -
2
Best for small-to-medium petsPetSafe 1-Piece Sliding Glass Dog Door, Medium
8.4/10 our score
See it on Amazon -
3
- 4
Check itEillion All-Metal Sliding Glass Dog Door, Large
Best for an inward-swing panel - 5
Check itEillion All-Metal Sliding Glass Dog Door, X-Large
Best for extra-large dogs - 6
Check itHakuna Pets Tempered Glass Patio Dog Door Insert
Best for small pets and rentals - 7
Check itPetoasis Magnetic 3-Flap Sliding Glass Dog Door
Best for a three-flap design - 8
Check itVEVOR Sliding Glass Dog Door, 91 to 96 in
Best for a tall track and large flap - 9
Check itAdjustable Aluminum Sliding Glass Dog Door, 75 to 80 in
Best for a basic standard-height fit
Best sliding glass dog door inserts by fit and use
The right insert is the one that matches your track height, track shape and pet's body size. These 9 picks cover standard and taller tracks, small pets, wide flaps and different installation needs.
PetSafe Sliding Glass Dog Door, 96 in Tall, Large: Best for taller patio doors
- 91 7/16–96 in height range
- 10 1/4 x 16 3/8 in flap
- 13 1/2 in panel width
- Locking closing panel and latch kit
This assembled panel fits taller sliding door tracks and has a flap for medium-to-large dogs. Its width reduces the human walk-through opening by 13 1/2 in.
Pros
- Single assembled panel
- Tempered glass and aluminum frame
- Includes closing panel and latch kit
Cons
- Fits taller tracks only
- Uses 13 1/2 in of walk-through space
The PetSafe Large 1-Piece is the strongest match here for a tall patio track and a medium-to-large dog. It adjusts from 91 7/16 to 96 in and has a 10 1/4 x 16 3/8 in flap opening.
The panel arrives as one assembled glass panel, with a weather-resistant aluminum frame and tempered glass. The magnetic flap and glass sweep help limit drafts, and the included closing panel slides over the flap when you want to restrict access.
Account for the panel's 13 1/2 in width beside your sliding door. That is space people lose from the walk-through opening, so check the remaining clear width before you buy.
PetSafe says this size is for dogs up to 100 lb, but weight alone does not determine fit. Compare the opening with your dog's chest width and shoulder height, and check our pet door sizing guide for the measuring steps.
PetSafe 1-Piece Sliding Glass Dog Door, Medium: Best for small-to-medium pets
- 75 7/8–80 11/16 in height range
- 8 1/4 x 13 3/16 in flap
- 11 1/2 in panel width
- Locking closing panel and latch kit
The Medium 1-Piece fits cats and small-to-medium dogs, with a low 1 3/4 in step-over. Measure the track and flap opening before choosing it.
Pros
- Single assembled panel
- Low step-over height
- Includes closing panel and latch kit
Cons
- Not for taller tracks
- Uses 11 1/2 in of walk-through space
The PetSafe Medium fits cats and small-to-medium dogs when the sliding track measures 75 7/8 to 80 11/16 in. Its 8 1/4 x 13 3/16 in flap is smaller than the Large, and its 1 3/4 in step-over is low.
This is also a one-piece assembled panel with a tempered glass insert, aluminum frame and magnetic flap. The closing panel and latch kit let you close the flap and secure the patio door with the insert in place.
The panel is 11 1/2 in wide, so it takes less walk-through space than the Large PetSafe. Still, use a tape measure to check the opening you will have left for people.
Choose it when the flap fits your pet and the track falls inside its height range. For other patio door types, our guide to dog door options for French doors explains why the door style affects the choice.
VEVOR Sliding Glass Dog Door, Large: Best for a metal flap cover
- 75 7/8–80 11/16 in height range
- 10 1/4 x 16 1/4 in flap
- Aluminum frame and tempered glass
- Locking design
VEVOR pairs a large flap with a metal cover and adjustable height for standard patio tracks. Its stated height range closely matches the standard PetSafe Medium, but the flap is larger.
Pros
- Metal cover
- Tool-free track installation
- Locking design
Cons
- No stated pet weight limit
- Height range must match the track
VEVOR's Large insert pairs a 10 1/4 x 16 1/4 in flap with an adjustable height range of 75 7/8 to 80 11/16 in. That makes it a standard-height option for buyers who want a larger opening than the PetSafe Medium.
The frame is aluminum with a tempered glass window, and the flap has a metal cover and hinge structure. VEVOR describes a lock design and track installation without tools.
The published description refers to small and medium pets in one place and calls the door Large elsewhere. Use the flap dimensions as the practical fit check, then confirm the track height and how your pet moves through an opening before ordering.
Consider this option if you need a large flap in a standard-height insert. If cold air is a concern, read how to stop drafts around a dog door and compare the closure and sealing features of each panel.
Eillion All-Metal Sliding Glass Dog Door, Large: Best for an inward-swing panel
- 75 7/8–81 in height range
- 10 x 16 in flap
- Fixed swing direction
- Frame drilling required
This Large model has a fixed swing direction based on which side of the sliding door it sits on. Its installation requires drilling holes in the door frame.
Pros
- Flap sized for large pets
- Magnetic seal and windproof strips
- Includes a slide-in closure panel
Cons
- Requires drilling
- Swing direction cannot be changed
The Eillion Large is for buyers who want an openable panel and can accept drilling during installation. Its height adjusts from 75 7/8 to 81 in, and the flap measures 10 x 16 in for pets up to 100 lb.
The swing direction is fixed by which side of the glass door the panel is installed on. On the left, it opens inward; on the right, it opens outward.
That choice matters if furniture, a walkway or the patio door itself limits the swing.
The maker calls out a 14.8 in glass door width and a safety lock. It also includes a slide-in closure panel, magnetic flap seal and windproof strips.
Choose this Large version if the flap fits your dog and drilling is acceptable. If you want an insert that can be removed without drilling into the frame, compare the pressure-mounted options instead.
Eillion All-Metal Sliding Glass Dog Door, X-Large: Best for extra-large dogs
- 75 7/8–81 in height range
- 13.4 x 23.7 in flap
- Fixed swing direction
- Frame drilling required
The X-Large flap gives bigger dogs a wider and taller opening than the Large version. Check the 18 in panel width and fixed swing direction before buying.
Pros
- Largest flap in this group
- Magnetic seal and windproof strips
- Includes a slide-in closure panel
Cons
- Requires drilling
- Uses 18 in of panel width
The Eillion X-Large has the widest and tallest flap in this group, at 13.4 x 23.7 in, for dogs up to 200 lb. Its frame adjusts from 75 7/8 to 81 in, so it targets a standard-height track rather than a tall patio door.
This version shares the fixed swing design and drilling requirement of the Large model. It is 18 in wide, which takes more of the human doorway opening, so measure that clear space as well as the track height.
The magnetic seal, windproof strips and slide-in closure panel provide ways to close and secure the flap area. The large opening may suit a bigger dog, but it also leaves a larger passage to manage when you want to limit access.
Pick it only when both the flap and panel width fit your space. For a very large dog, measure from the floor to the shoulder and compare the dog's chest width with the opening before deciding.
Hakuna Pets Tempered Glass Patio Dog Door Insert: Best for small pets and rentals
- 77.2–83.5 in height range
- 6.7 x 9.3 in flap
- No-drill pressure mount
- Track type limits apply
The small flap and pressure mount suit cats and small dogs where the track is compatible. It fits Track-Lip and U-Channel tracks, but not Flush, Narrow or Bifold tracks.
Pros
- No-drill pressure mount option
- Tempered glass
- Five-year warranty
Cons
- Small flap for pets up to 20 lb
- Does not fit every track type
Hakuna Pets is the small-pet pick for a compatible sliding track and a renter-friendly pressure mount. Its flap measures 6.7 x 9.3 in and is intended for cats and small dogs up to 20 lb.
The frame adjusts from 77.2 to 83.5 in and fits Track-Lip and U-Channel tracks. It does not fit Flush, Narrow or Bifold tracks, so identify your track style before ordering.
The insert uses tempered glass in an aluminum frame. A spring-jack pressure mount allows no-drill installation, or you can use the included brackets for a permanent mount; a metal panel closes access.
Hakuna Pets backs this model with a five-year warranty. Choose it when your pet is small and your track is compatible, rather than trying to make its smaller flap work for a medium or large dog.
Petoasis Magnetic 3-Flap Sliding Glass Dog Door: Best for a three-flap design
- Recommended track range 77 1/2–82 in
- 10 1/4 x 16 1/4 in flap
- 14 1/4 in passage reduction
- No-drill or drilled installation
The three-flap design and double magnetic closure may suit buyers who want more than one flap layer. Measure the track and account for the 14 1/4 in reduction in door passage.
Pros
- Three-flap design
- No-drill installation option
- Includes flap replacement service
Cons
- Connecting hardware is not included
- Reduces clear passage by 14 1/4 in
Petoasis stands out for its three-flap design and double magnetic closure. Its flap opening is 10 1/4 x 16 1/4 in, and the recommended track range is 77 1/2 to 82 in.
The frame is aluminum with tempered glass. You can install it without drilling or drill for added security, but connecting hardware for the existing door is not included.
The insert reduces clear passage width by 14 1/4 in. Check the remaining space before choosing it, especially if people often carry laundry, groceries or other wide items through the patio door.
Petoasis offers a three-year warranty and flap replacement service. Choose it when the flap size fits and you value the layered design, while planning to source the connection hardware if your setup needs it.
VEVOR Sliding Glass Dog Door, 91 to 96 in: Best for a tall track and large flap
- 91–96 in height range
- 13 5/8 x 23 5/8 in flap
- Aluminum frame and tempered glass
- Locking design
This VEVOR panel fits taller tracks and has a large flap for bigger pets. Compare its flap dimensions with your dog's shoulder height and chest width.
Pros
- Large flap opening
- Fits a taller track range
- Tool-free track installation
Cons
- No stated pet weight limit
- Only fits taller tracks
This VEVOR insert fits a tall track from 91 to 96 in and has a 13 5/8 x 23 5/8 in flap. It is the tall-track option here for pets that need more opening height and width than the standard VEVOR model provides.
The frame combines aluminum alloy and tempered glass, with a metal plate and rotating hinge design. VEVOR describes tool-free installation into the patio track and a lock for restricting access.
Its flap is larger than the tall PetSafe Large opening, but the product details do not give a pet weight limit. Measure your dog against the flap and confirm the tall track range before choosing it.
Pick it if a large flap and tall panel match your doorway. If your track is standard height, one of the 75–81 in models is a closer fit.
Adjustable Aluminum Sliding Glass Dog Door, 75 to 80 in: Best for a basic standard-height fit
- 75 3/5–80 in height range
- 10 1/5 x 16 1/2 in opening
- Aluminum frame
- No permanent door modification
This aluminum insert covers a common standard-height range and has an opening for medium and small dogs. The maker's guidance asks buyers to measure the door height before ordering.
Pros
- Adjustable standard-height range
- Aluminum frame
- No cutting into the sliding door
Cons
- Requires a screwdriver and electric drill
- Opening guidance is less specific for large dogs
The adjustable aluminum insert is a standard-height choice for a track between 75 3/5 and 80 in. Its opening is 10 1/5 x 16 1/2 in, and the stated pet limit is 75 lb.
The aluminum frame is designed for a sliding glass door, with no permanent modification to the door. Installation requires a screwdriver and electric drill, so this is not a drill-free option.
The maker describes the opening as suitable for medium and small dogs, despite the Large size label. Use the stated opening and your dog's measurements to judge fit, and check that the track height falls within range.
Choose it for a straightforward aluminum frame when the flap dimensions and installation method suit your home. Measure before ordering and account for the hardware needed to install it.
How do you choose a sliding glass pet door insert?
Choose by measuring the patio track and your pet first, then compare panel width and installation requirements. A flap that looks large enough can still be a poor fit if the track is too short or the insert blocks too much of the human doorway.
What height should a sliding glass dog door fit?
Measure from the bottom of the lower track to the top of the upper track, then match that measurement to the insert's range. Standard-height picks here cover roughly 75 3/5 to 83 1/2 in, while the taller PetSafe and VEVOR models fit about 91 to 96 in.
Do not assume that a telescoping panel covers every patio door height. Check the exact range and account for any track lip or installation bracket called out for that model.
How large should the flap opening be?
The flap should give your dog room to pass without forcing its shoulders or chest through. Compare the opening's width with your dog's chest and its height with the dog's shoulder height, and avoid choosing from weight guidance alone.
The smallest flap here is Hakuna Pets at 6.7 x 9.3 in, while the Eillion X-Large and tall VEVOR have openings over 23 in high. Bigger openings can suit large dogs, but need more room and access control.
How much doorway space will the panel take?
The panel sits beside your sliding door, so its width reduces the passage for people. PetSafe's Medium panel is 11 1/2 in wide, its Large is 13 1/2 in, and Petoasis says it reduces clear passage by 14 1/4 in.
Measure the usable opening with the panel in place. This is especially useful if you regularly move a stroller, laundry basket or bulky items through the patio doorway.
Should you choose a no-drill or drilled insert?
A no-drill insert can suit rentals, but installation methods vary. Hakuna Pets offers a spring-jack pressure mount, while Petoasis describes no-drill installation and an optional drilled setup; Eillion requires drilling holes in the frame.
Check the included hardware and how the insert locks with your patio door. A removable panel may be easier to take when you move, while a drilled mount may be preferred when you want a more fixed setup.
What helps limit drafts and unwanted access?
Look for a magnetic flap, closure panel or lock, and check whether the frame includes seals. PetSafe describes a magnetic flap and glass sweep; Eillion mentions magnetic sealing and windproof strips.
These features can help close the opening, but they do not replace a fit check. Use the closing panel or lock when you want to keep your pet inside or limit access through the flap.
Which sliding glass dog door insert should you choose?
Choose the PetSafe Large if you have a taller track and need a familiar large flap with an assembled panel. Pick the PetSafe Medium for a standard track and smaller pet, or the Hakuna Pets if you have a small pet and a compatible track.
For a larger opening, compare the Eillion X-Large with the tall VEVOR, then check panel width and installation needs. Before you buy, measure the track and pet, and read how to install a dog door in a glass door for the options and fit considerations.
Our top 3 picks at a glance
-
1
Best for taller patio doors
PetSafe Sliding Glass Dog Door, 96 in Tall, Large
8.6/10 our score
See it on Amazon -
2
Best for small-to-medium pets
PetSafe 1-Piece Sliding Glass Dog Door, Medium
8.4/10 our score
See it on Amazon -
3
Frequently asked questions
Do sliding glass dog door inserts need cutting?
Most track inserts fit beside the sliding door without cutting into the door, wall or frame. Installation details vary, so check whether a model uses pressure, brackets, screws or drilling.
Measure your track before ordering, and confirm whether the insert leaves enough space for people to pass through.
How do I measure for a sliding glass dog door insert?
Measure the sliding door track height from the bottom of the lower track to the top of the upper track. Then compare your pet's shoulder height and chest width with the flap opening.
Also check the panel width, since it reduces the space left for people to walk through.
Will a sliding glass dog door insert fit every patio door?
No. Inserts have set height ranges, and some also require a specific track shape.
Hakuna Pets, for example, fits Track-Lip and U-Channel tracks, but not Flush, Narrow or Bifold tracks.
Check track style and height before choosing an insert.
Can I lock the patio door with an insert installed?
Some inserts include a latch kit or a closing panel, while others have a lock built into the panel. Check which parts are included and how they work with your existing sliding door.
Use the closure when you need to limit pet access or close the flap.
