Item Description:

''M'' version:

Female: 12cm inside diameter (15" in circumference) Female collar with a magnetic lock

Male: 14cm inside diameter (17" in circumference) Male collar with an Allen key lock

Cylinder:

Female: Inside Diameter: 12cm

Male: Inside Diameter:14cm

17'':

14cm inside diameter (17" in circumference)

2cm depth

260g weight

High collar:

Female：diameter 12cm (4.72'') ,  Male: diameter  14cm (5.51'')

Collar 2:

Male size:
-Neck diameter：13.5cm = 5.31 inch
-Neck girth： 42.4cm = 16.7 inch

Female size:
-Neck diameter：11.8cm = 4.65"
-Neck girth：37cm = 14.6"