What David said. With the largest links I find it impossible to get the right fit. There is a big size difference by removing and adding one big link ..the smaller links ( medium size) I have found to be more customizable. Plus on my slowly becoming arthritic 43 year old hands it is easier to take on and off.
Alvin - GSD - born @ late February 2013
Bo - Boxer/Hound - born @ late June 2008
Greta - English Mastiff - born somewhere between 2003 and 2005 ,estimated.
ALL MY RESCUES!