Kids X-Small [Ages 5-7]
Kids Small [Ages 6-9]
Kids Average [Ages 9-14]
Kids Large [Ages 12-17]
Kids X-Large [Ages 14-18]
Adult Narrow
Adult Average
Adult Wide

Eye Size

Buying glasses online may be a new experience, but we're here to help you through the process! If you didn't know that glasses had sizes, you're not alone. Frame size is comprised of several elements, measured in millimeters. Each frame will have its measurements shown in the product details. e.g. [A:49 B:32.5 DBL:17 TL:135]. 

Check out the guide below and to find your recommended Rec Specs eye size, check out our Sizing Guide.


  • A:  Lens Width [Eye-Size] - The horizontal measurement of one lens
  • B:  Lens Height - The vertical measurement of one lens
  • DBL:  Distance Between Lenses [Bridge Size]  - The space between the lenses

  • TL:  Temple Length - The length of the sides/arms of the glasses