Decisions, decisions:
Condoms come in lots of colors and textures these days but only two things matter: They should be made of plastic or latex (which is way more reliable than animal tissue condoms) and they should fit snugly. (Yes, they do come in different lengths, widths, and thicknesses.)
Inspection:
Condom packages show an expiration date. If a condom is past the date, or looks dry, brittle, stiff, or sticky, it shouldn't be used. Keeping a few spares on hand is a good idea in case one rips while being put on.