Rogz Fancy Dress Extra Large 1" Armed Response Side-Release Fashion Dog Collar, Purple Chrome Design Low-Load Technology to Reduce the Load on the Buckle Lockable RogLoc Buckle Box-Stitched Joins for Extra Strength Contoured Plastic Components for Better Fit Fully Adjustable Collar for Neck Sizes 17-27" Our Armed Response collars are 1" in size and adjust from 17" to 27" and are suitable for Rottweiler, Bouvier and similar sized breeds RogLoc and Side Release Buckle are completely dog-paw resistant. Low Load Technology reduces the load on the buckle and collar adjusts from 17" to 27" Die-Cast Ring Contoured Components ensure a snug fit.