Baskerville Ultra Muzzle for Dogs Size 4 is a large-end sizing option in the Baskerville Ultra range, designed for dogs bigger than a Size 3 but not large enough for a Size 5. It's a padded, adjustable basket muzzle used for supervised management during vet visits, grooming, training and walks.

The Ultra's patented humane basket design lets the dog pant, drink water and take small training treats while wearing it, which is the core difference between a safe extended-wear muzzle and a restrictive sleeve. The frame is breathable, the neck strap is adjustable and padded, and correct sizing is based on snout measurements rather than breed alone. Size 4 fills the gap between the smaller mid-range and the largest Baskerville Ultra sizes.

Getting the right size Baskerville is the single most important factor in whether a muzzle is safe and usable, so Size 4 exists specifically for dogs whose snouts sit between Size 3 and Size 5. Trainers and behaviourists consistently recommend Baskerville Ultra over cheaper alternatives because of the pant-and-drink design.