I bought some of these a few months ago (back ordered now) and they are just a bit bigger and fit most larger sleeves LP outer sleeves that are strong and durable and super clear.
I'll look into these. I managed to squeeze in this Stoughton in, but its really testing the tensile strength of the sleeve.
@wenis the MSFL ultra clears are designed to hold their tip on gatefolds. I spent a....substantial amount of money of them last year