Sunthreads Collar Sizing Guide
Which collar size is right for your dog?
Here are a couple tips, to help you eliminate the guessing game.
- Measure your dog's neck! Grab some sewing tape, tailor's tape, or a string (measure the length of the string after wrapping). Wrap it around your dog's neck and check the length. Please note: You should still be able to fit 2-3 fingers between the tape and your dogs neck to ensure its not too tight.
- Pick a size that's best for your dog using our sizing guide below.
- If your dog's neck measurement falls right on an in between size, you will have to make a judgement call. Consider if your dog is growing. If you think it may be tight, size up!
FI COLLAR SIZING CHART

NORMAL COLLAR SIZING CHARTS
(NOT FI COMPATABLE)
Here is the same guide, but in visual format. (Not Fi Compatible)