Here's a pic of one of my bits that I used to use -
I've also got a D-ring stainless steel snaffle that I use most with Sam - bought it on eBay for less than ten dollars used! It was a bit squeaky in the rings, but I put some mineral oil in it and it stopped - I think Sam liked the squeak, though!
This is my favorite bit, I really like 3 piece bits now and the shanks are no more than 3" and the purchase is probably 2". I also have a tom thumb with 3 1/2" shanks and a 2 1/4 purchase. It's got a nice ratio and despite the straight shanks my horse likes this bit just fine, can't tell the difference between the two on which one he likes more. I only got the other bit because of what people were saying about the tom thumb. I talked to my trainer and she didn't scold me, she said that my curb strap is so loose that that will help with the presignal this bit lacks because of the straight shanks and that is all she said about it period so I think it riles people up more than it should probably. For English I want a full cheek snaffle I need to go shopping!
I ride in one like that-for now. Before I was in a snaffle and before that another kimberwick-which pinched him so I had to take it out.
I've ridden in a lot, trying to find the right one and for training purposes. But I'm pretty happy with the one above.