Cocoons Size Finder


Please note that the Cocoons Fitovers Sizing Calculator is designed to provide sizing results for Cocoons Fitovers.  If you need to determine your size for Vistana Luxury Fitovers, please use the Vistana Size Finder.

Cocoons are designed to be worn over your prescription glasses. To achieve the perfect fit, it’s important you find the size that most accurately fits over your eyewear frames. Simply measure your eyeglasses then select the frame model that is slightly larger in width and height than your prescription eyewear. NOTE: For additional sizing instructions, please scroll to the bottom of this page to download our Printable Sizing Guides.

How Do I Use the Cocoons Fitovers Sizing Calculator?

1. Measure the full WIDTH of your glasses at the widest points.

2. Measure the HEIGHT of your glasses from top to bottom.

3. Choose your WIDTH and HEIGHT range. Click “Find My Size” to see your options.

Width (mm):

Height (mm):


Printable sizing guides are available for Cocoons Fitovers, Clip-Ons, and Vistana Luxury Fitovers.  Please see below.

The sizing guide MUST be printed at 100% actual size, or it will not provide an accurate recommendation of the size that fits over your glasses. It is important to set your print preferences with the scaling option turned off. This will ensure that the document prints at full size. Use the image of the coin on the printed sizing guide to verify it printed at 100%. The image should be the same size as an actual US quarter or should measure 24 mm in diameter if you do not have a coin for comparison.

FITOVERS:  Place your glasses face down on the full scale images of each size.  If your glasses fit inside the red guideline box, then that size will appropriately fit over your prescription eyewear.   If the width or height of your glasses extends outside of the red box, then you will need to try the next larger size.

CLIP-ONS:  First, identify the shape (Oval, Round, Rectangle, or Square) that most resembles the shape of your prescription eyewear frame.  Next, place your glasses face down on the full scale images of each size within the shape collection to find the size that is most accurate to the shape of your glasses.  It is important that the shape of the clip-on closely matches the shape of your glasses in order to fit appropriately.

Cocoons & Low Vision Fitovers

Vistana Luxury Fitovers

Cocoons Clip-Ons

Cocoons Flip-Ups

SideKick UV Filters

Fitover (OTG) Goggles