Spencer's head grew and we got him a new helmet.

I was hoping to donate his old helmet to one of his on-line buddies that need it.

First response wins the prize.

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How do you know if a XXS would fit your child?

Measure the head circumference, measurement "A", at the eyebrow level. Then, measurement "B", measure from the front of the forehead to the back hair line, over the top of the head. Then, measurement "C", measure from just above one ear over the top of the head to just above the the other ear. The measurements can then be matched to what helmet is closest to them, keeping in mind the head measurements must be less than the measurements of the helmet.

XXSmall-- A. 18 1/4" B. 12 3/4" C. 9 3/4"

next size up is XSmall which we just got for Spencer.

XSmall-- A. 20 1/4" B. 13 3/4" C. 10 1/2"

I do not need this, but for clarifaction, what are the units of your measurements?

Kamie,

Oops, you must use the metric system for measurement. hehehe Sorry, I forgot my audience for a minute.

This is inches. A little "slang" here is to use "=inches.