SIZE CHART:M: length 59cm, width 4cm, suitable for neck size 35-45cm L:length 67cm, width 4cm, suitable for neck size 43-53cm XL:length 75cm, width 4cm, suitable for neck size 51-61cm Durable Material. large dog collar is made of high quality and durable nylon material with neat stitching and soft padded lining to prevent chafing for your dog's skin and hair with a comfortable fit.Double pin buckle design. This heavy duty dog collars has metal double pin buckle with 5 adjustable points, convenient for you to adjust the length as desired. Elastic band of this k9 collar tactical will put away the adjusted extra belt. so your dog can't rip it off.D-Ring and magic sticker ID panel and adjustable dog collar buckle. The german shepherd dog collar has a D-Ring can be attached a dog leash to keep your dog next to you easier by your control. There is an magic sticker ID panel on this metal buckle dog collar that can be placed for patches.Simple Design. There isn't a lot going on all over the collar and it's comforting for the dog to lay down flat without a handle, bumps, spikes, etc obstructing or interfering with their sleep. Please follow the size chart to measure your dog carefully before you place the order to ensure the flat dog collar is fit well to your dog.