Hi, I have a Stubben and its great quality and i have found it true to size. I must admit that I had to buy separate pieces as my lad has an XF brow band and noseband but all other parts are full...he's an odd bod!!
I have a few Stubben bridles but I probably wouldn't buy any more nowadays as I am not that keen on them anymore. What I've found with them is for the big WBs I have, the nosebands are not large enough for them. The rest of the bridle is fine size wise, but not the nosebands. They fit my TBs fine though so it would depend on what type of horse you have. Overall sizing, I'd say runs a little small imo.
Thanks for your replies, I have seen one for sale that is listed as a cob/full size, I have a 16.1 tb/id who at the moment wears a sabre full size, which is a tad generous in size, but he does have a smallish head x
I got a cob sized one for my 15.2 connie x ISH - it seems to have come up quite big on him and I've had to put quite a few extra holes in. The quality is nice though.