If you have large links, sometimes it is difficult to get the perfect fit. You can put a flat collar below it to hold it up, but sometimes the flat will slide under the prong. I use a 2" Ray Allen collar for this.
I use smaller link collars and add extra links to fit the dog so the adjustability is there. They seem to be easier to finesse than the larger collars too... If that makes any sense.
When a dog saves the life of a man, it becomes clear that partnership knows no bounds.
Fama - T.E.D.D. OEF XI-XII (GSD)(RET)
Marshall - T.E.D.D. OEF XII-XIII (Lab)(SF EDD)
Lucian - Med Alert / Mobility SD (Cane Corso)
Pud - the old man (Pit x Lab)