Hi... I think it's close to normal size, but maybe a little narrower than some... so I measured the openings... the widest part from front to back is 1.75"... the narrowest part at the left & right sides is just over an inch, but usually that's enough room for the arms points... and the depth when closed from top to bottom is about 1.5"... so I am thinking the glasses can't be too wide or too thick, so it just depends on the glasses and just how big they are! :-D My glasses (which the case came with) don't have very big/tall lenses... they are small oval frames... but there is room to spare when these are in there... so just depends on your measurements! :-D Thx for asking!