Harnesses:
Fits Neck Size 17 - 24 inch (45-60CM)
Fits Chest size (behind front legs) Size 26- 34 inch (65-85CM)
5 holes adjustment
Collars:
Small Size Fits Neck 15-18 inch, 2 Inches Wide, 20 Inches Long
Medium Size Fits Neck 17-20 inch,2 Inches Wide, 22 Inches Long
Large Size Fits Neck 19-22 inch,2 Inches Wide, 24 Inches Long
X-Large Size Fits Neck 21-24 inch,2 Inches Wide, 26 Inches Long Note: Before you order,Be sure your dog's neck is suitable for this size (That's very important).