NECK COLLAR ONLY: Cut cloth 25mm buckles with roller & keepers, teamed up with 25mm strapping (1500 kg breaking strain) Including brass eyelets, 25mm D-ring. If you already have our wrap around cover, you can buy this neck collar separately. NECK COLLAR WITH WRAP AROUND COVER Closes with Velcro on a 50mm strap that locks closed when the tracker is buckled up around neck collar. How to measure: Only take the size with SEWING TAPE! Have your dog standing go mid neck with sewing tape for an end to end size in centimeters. -Also let me know how wide you would like the collar. eg. on my Kelpie I run 10cms wide. Her neck size around is 33cm small dog. -Let me know if you like holes in the neck collar if using track train collars. -Also look at our 1" long probes, stainless steel extra long pins for Garmin track/train collars. Call me if u need 0428658432 I’m happy to help. Note: Neck collars are custom-made with your dog measurements. Use this form to send your dog measurements.