1 1/2" Not for small dogs and cats! Too Big! 3/4" Nylon Loop to slide around dog collar - **The strap on this bell is riveted tight, it is not a snap that opens and is not adjustable.** Strap does not open! It is riveted so it does not come apart! For medium to large dogs WARNER SPORTING BRASS PLATED STEEL DOG COLLAR BELL (BEAR BELL) (1 1/2" bell) New 1.5” steel arctic sleigh dog bell. This bell has a 3/4” heavy duty nylon loop that will slide over a dog collar up to 1½’” wide (including buckle). These dog bells make and excellent jingle that carries good in the field or woods. Bell loop keeps bell close to collar. **The strap on this bell is riveted tight, it is not a snap that opens and is not adjustable.**