The display dimensions are 2.75" x 0.75". Some are darker than others, if you have a preference, let me know, I will try to pick your favorite.
The width of the slanted slot is 1/16".
A folded 110 lbs index cover card fit in the slot, however, they are top heavy and it will require a glue dot or some adhesive underneath to stay put.
Please look at my other listings and if you would like multiple items, message me before purchase. I consolidate shipping costs.