Does it matter if a rug is a bit too big for a horse ? I wouldn't want to put a too small one on, but if it hangs over the bum a bit further is it a big deal ?Obviously wouldn't want one that was far too big at the neck.
I don't mind them a bit big at the back as long as the front fits and the surcingles are the correct length. I usually have to shorten surcingles, which always strikes me as strange when I have chunkier native types. Obviously there is a bit big and then there is drowned!
If the neck is too large just get your saddler to put a dart in it either side, takes up the slack.
It was one of the most common jobs I had to do on site at yards as I travelled round them with industrial sewing machines in my van. Surcingles, front straps and leg straps can easily be re positioned too for a better fit, in fact all of it can be altered to make it fit on site or as a Saddlers shop as long as the rug is clean and not carrying mud which knackers our machines.
Oz