A Myler comfort snaffle, low port with hooks, size 4 1/2 or 4 3/4 either eggbutt or full cheeks they want to sell me, was bidding on one on eBay and got pipped to the post at the very last second.
They're seems to be loads of 5 1/2's about but not much smaller. I've borrowed one off a friend to try and she's been fantastic in it it's just that's a 5" and it's too big