1953-55 Dormand

So, I won a raw 53-55 Dormand card at auction, but I don't know the best way to protect it when it arrives. I have some larger top loaders, but want something comparable to a slab (i.e.onetouch). I can't find any that will fit the dimensions of the card.

Does anyone else have any of these cards? How do you store/protect/display them?

Thanks in advance!!!