Yeah, they'd stick out of the Ultra Pro. I wonder what ones I have? it's been a long time since I've bought four pocket.
BCW does make ones that would fit
http://www.bcwsupplies.com/products/...ocket-page.htm
3 1/2 x 5 1/4, and they say the pocket is actually 3 15/16 x 5 1/2 so not a great fit. But better than Ultra -Pro.
I've been slowly migrating out of pages, I had loads of vinyl ones.
Steve B