Stinky is just under 15.1 and is in 6'3s but he is still filling out and may end up in 6'6 rugs.
Farra is just under 16.3 and in 7' rugs and whilst she is still filling out, I think probably will stay in this size as some of these are Cairo's rugs and they fitted him fine.
I am lucky in that our clydesdales fit in the larger end of the market sizes for rugs and tack.
15hh connie somewhere between 5'9" and 6'0", a 5'6 thermatex fits pefectly, 6'0 premier equine drowns him and he's currently wearing a 6'3 fal that again is very large and hangs below his knees