Heavy Duty Frogglez® Goggles

Size Guide
UDT - Underwater Demolition Team Edition


Strap: 20 - 22.5 inches head circumference

Goggles: Medium

Suggested Age: 4 yrs - adult

CONTENT: Frogglez UDT Strap, Silicone Extension Ring, White Silicone Swimming Goggles
  • UDT - Underwater Demolition Team edition for the adventurous soul
  • Wider, longer strap to fit heads above 20 inches in diameter and up to 23 inches comfortably(Youth and Adults)
  • Stronger Velcro attachment for more strength and the ability to attach to half and full masks
  • Silicone Extension Ring to allow size adjustments and attachment to most goggles
  • Soft and Gentle on hair 
  • Less Water Leakage due to secure fit of goggles
  • Clear White or Green Tinted (gray) Silicone goggles 


The Frogglez UDT strap has been tested with many goggles and masks and is perfect for snorkeling and scuba diving. We even are testing it for Speed Skating and Jet Skiing! Use our amazing silicone goggles or attach your own!



Frogglez Size Guide
Frogglez Goggles are designed to fit most kids without adjustments.
That being said, there are several variables that affect the fit of goggles.



The head circumference determines the size strap you will want to use as well as if you will want to use any silicone extension rings.

This is how you measure head circumference:

Average head circumference for CHILDREN is 19 - 21.5 inches

Average head circumference for ADULTS is 21.75 - 22.5 inches



The best width of the goggles will be determined by the width of the head and the space between the eyes. This varies dramatically and is the reason why so many different goggles exist on the market. There is not one perfect goggle, only the one that fits your face best. Frogglez come in 2 sizes to accommodate the vast majority of faces and are designed so that you can attach the strap to almost any goggle should you find one that fits your face perfectly.

Most goggles will either leak at the far edges on the side of the face due to being too wide or right next to the bridge of the nose if there is not enough support yet for the sealing edge.

Frogglez are designed to put gentle pressure in the sealing edge of the face where the goggles tend to leak providing a superior fit. This seal is best if no extension rings are used.

Measuring the distance between the temples gives a good estimate on which goggle size will fit best.

SMALL GOGGLES:   4 inches or less


HALF MASK:              4.5+ inches (does not work well without a bridge between eyes)



These innovative rings allow for the increase in size of all Frogglez Goggles! Adding an extension ring is easy and also makes attachment to other goggles simple.

Frogglez Silicone Extension Rings