XL Bullies, American Bulldogs and Boxers have some of the widest, deepest chests of any companion-sized dogs. Standard XL harnesses are built around slimmer breeds at similar weight. The Prestige XLarge, at 70–80cm chest, is the size that actually wraps correctly around these wide-chested builds. Direct seatbelt-buckle clip, reinforced webbing, no adapters required.
XL Bullies, American Bulldogs and Boxers carry significant muscle mass in the chest and shoulders. A harness that fits correctly — rather than shifting on a chest it wasn't sized for — keeps the dog in position through corners and sudden stops. Less movement in the back seat means less distraction for the driver. The XLarge at 70–80cm is the right fit for these builds, not a guess based on general 'large dog' sizing.
| Size | Chest girth | Suitable flat-faced breeds |
|---|---|---|
| Large | 60–70cm | British Bulldogs, Aussie Bulldogs, Staffies, Standard American Bullies, AmStaffs, female Boxers |
| XLarge | 70–80cm | XL Bullies, American Bully XL, American Bulldogs, large Aussie Bulldogs, large male Boxers |
Measure at the widest point of the chest, just behind the front legs. If between sizes, size up.
Most new owners put real thought into the collar, the lead, the bed. The car harness gets left on the to-do list until the first hard stop reminds you it should have been priority one. The Prestige XLarge is the one we'd hand over at pick-up day: proportioned for the barrel chest, clips straight to the seatbelt buckle, nothing complicated to fit at the car door.
Wide-panel webbing and reinforced stitched seams proportioned for the barrel-chest build of stocky compact breeds. Holds shape through daily use.
Clips to the standard vehicle seatbelt buckle. No adapters, no fiddly hardware. On in seconds at the car door — useful when you're doing it every day.
Proportioned for back-seat and cargo-area travel in utes and SUVs. Keeps your dog in position on highways, gravel tracks and city commutes.
Owner feedback from XL Bully, American Bulldog, large Aussie Bulldog and large male Boxer owners across Australia.
Prestige Dog Car Safety Harness — XLarge Black
"Most XL harnesses are cut for greyhounds, not bulldogs. This one actually fits around Diesel's chest without gaps or shifting. Three months of daily ute runs and it's still holding solid."
Prestige Dog Car Safety Harness — XLarge Black
"My XL Bully used to slide across the whole back seat on every corner. Now he's clipped in and stays put. The seatbelt clip takes about five seconds — no fuss at the car door, which matters when you're doing it every day."
Prestige Dog Car Safety Harness — XLarge Black
"We do weekly beach runs in the ute. Tank used to slide everywhere on the bends. Harness keeps him seated the whole drive — and he got used to the routine within the first trip."
Prestige Dog Car Safety Harness — XLarge Black
"Took a couple of minutes to dial in the fit. Once it was sorted, Mabel sits and stays the whole drive without wriggling. Connects straight to the seatbelt — that's exactly what I was after."
A: The XLarge fits dogs with a chest measurement of 70–80cm, measured at the widest point behind the front legs. If your dog sits between sizes, contact us before ordering.
A: The XLarge is built for larger brachycephalic and barrel-chested breeds in the 70–80cm chest range. This includes most XL Bullies, American Bully XL, American Bulldogs, larger Aussie Bulldogs and large male Boxers. Measure your dog before ordering to confirm fit.
A: Yes. The 70–80cm range is sized for XL Bullies and American Bully XL — breeds that carry significant chest width that standard XL harnesses don't account for. Measure at the widest point of the chest before ordering.
A: Clips directly to your vehicle's seatbelt buckle. No adapters or extra hardware needed. XL Bullies and heavy Bulldogs put real load on harness hardware — inspect the clip and webbing before every trip and replace immediately if any wear is visible.
Product: Prestige Dog Car Safety Harness — XLarge Black
Suitable for: XL Bullies, American Bully XL, American Bulldogs, large Aussie Bulldogs and large male Boxers · Chest girth: 70–80cm · Measure at the widest point behind the front legs · Size down to Large if between sizes
Construction: Reinforced webbing with reinforced stitched seams; wide-panel chest plate
Attachment: Direct seatbelt-buckle clip; no adapters required
Colour: Black
Care: Hand wash cold, air dry
Price: $59.95
Fit and adjust the harness correctly before every trip. Check the chest-panel webbing, adjustment points and seatbelt clip each time. Replace the harness if any hardware or webbing shows signs of wear.