Our mouthguards are available in 2 sizes, ‘Up to age 10’ and ‘age 10+’. OPRO Kids Mouthguards are recommended to be worn up to the age of 10, though the sizing may depend on the height/size of the child. Kids gum shields are available in a range of colours, designs and protection levels including Instant Custom-Fit, Gold, Silver, Bronze, and Snap-Fit.