These are the definition of convenience!  You can open and close them with 2 fingers. . .easy-peasy!  You could even fit 2 pairs of reading glasses in these, if you want.  They work for ALL glasses and sunglasses EXCEPT for the really oversized ones. . .which are popular now.  I have some "Jackie O." style shades and some "J-Lo" style shades (both by Steve Madden) that will go in them with a little pushing past the soft leather opening.  But I have some "ski bunny" style shades (by Armani Exchange) that will not.  Anyway, the quality and craftsmanship of these are outstanding.  I have the lovely red and the rich brown.