Width 1inch / 25mm
Semi-Slip from £10.50
Side Release from £12.99
Sizing for Semi Slip (When Pulled Tight) 
Xsmall 12" to 14" (30.5 cm to 35.5 cm)
Small 14" to 16" (35.5 cm to 40.5 cm)
Medium 17" to 19" (43 cm to 48 cm)
Large 20" to 23" (51 cm to 58.5 cm)
Sizing for Side Release 
Xsmall 12" to 15" (30.5 cm to 38 cm)
Small 16" to 19" (40.5 cm to 48 cm)
Medium 20" to 22" (51 cm to 56 cm)
Large 23" to 26" (58.5 cm to 66 cm)
 
Matching Leads also available from £12.50