I've switched to using a light weight photo paper from red river, full gloss. 100 sheets is about $23, and $32 for legal size. Since they're in the case, and have no bleed through, the thinner paper works fine for me, and easier to cut.
A UGC cover is 11.22 x 7 inches, A4 paper is 11.7 x 8.3 if you do portrait. Standard US paper is 11 x 8.5, so we just can't quite get the width. DS cases will fit on a US page, but your boarders will give you issues depending on printer.