Purchasing the correct size WHISTLE™ Health & GPS + (SWITCH™) collar ensures that your pet is the most comfortable they can be while wearing the device. Collars run small due to the tracker body being on the inside of the collar, so when in doubt, choose the larger size. There is also some overlap in the recommended neck circumference in each size. Read on for our recommendation on sizing for Whistle Health & GPS+ collars!

Three available sizes

Whistle Health & GPS+ collars come in three sizes: Extra Small/Small (XS/S), Small Medium (S/M), and Medium Large (M/L)

Extra Small/Small:

Neck size (in inches): 8 - 11"

For dogs up to 25lbs in weight

Example breeds:  Dachshund, Scottish Terrier, Maltese, Pekingese, Pomeranian, Toy Poodle, Yorkshire Terrier, Pug

Small Medium:

Neck size (in inches): 12 - 18"

For dogs up to 50lbs in weight

Example breeds: Beagle, Border Collie, Miniature Schnauzer, Boston Terrier, English Bulldog, Cavalier King Charles, French Bulldog

Medium Large:

Neck size (in inches): 16 - 24"

For dogs up to 75lbs in weight (*not recommended for dogs over 75lbs)

Example breeds: Boxer, Dalmatian, Golden Retriever, Labrador Retriever, Weimaraner