A 2.5 centimetre plastic buckle collar can be seen in the picture. It is made up of welded metal parts and a strong technical quick-release buckle. The textile part is made up of a strong, ribbed polyester webbing and a hard-wearing, patterned ribbon. For more information on the type of collars, see here.
If you are puzzled in connection with the size of the collar, click here for help.