Half Check Collars (martingale collars) are made for the Leather Section to pull tight to the neck measurement entered, they do not have buckles for adjustment and are put on by slipping over the dog`s head. The Leather Section will encircle the neck tightly in the tightened state (see picture on left) but the Collar will hang loose when not being used as a Check Collar attached to a lead (see picture on right).
To measure for a Check Collar please measure the Smallest Part of the neck (up behind the ears) with a soft tape measure pulled reasonably tight (so it does not strangle your dog but also not too loose) then enter this exact measurement, do not add or subtract anything from it. The Collar Leather Section will then be made to pull tight to the neck measurement given in order for it to act as a check collar. The chain section allows the collar to open up by 133mm (5 1/4") allowing the collar to go over the head and to drop to the base of the neck and hang loose when not being used with a lead, if you would prefer the loose state to be tighter and for the leather section to pull tight to a smaller measurement when used as a check collar than the actual neck size then just deduct a little from the measurement taken. Please note once made they cannot be altered in size.