These sleeves are tough enough to use on their own...

I like standard perfect size sleeves... however one down side to the thin perfect size... is the bottom corners of your outer sleeve will have less support hence its just a thin sleeve at the corread moreners, instead of cardboard.
These sleeves really stiffen things up, and makes the corner of your outer sleeves more rigid, shuffling becomes easier, your sleeves will be less likely to buckle at the corners.