Size Guide - Boys Shirts

To find the right size school shirt for your child, you will need their collar measurement. View our fitting guides to watch a quick and simple video showing you the correct and accurate way to measure your child for their school shirt.

To measure their collar, wrap the tape measure gently around the base of their neck. Put two fingers between the tape measure and their skin while you do this; this will ensure a more comfortable fit. Choose boys’ school shirts based on this measurement but do also check the chest measurement of the garment as well to make sure these two areas both fit. It’s better to have a comfortable, fitted chest and a slightly looser collar than a well-fitted collar and a chest that’s straining at the seams.


Collar Size (inches) Collar Size (cm) Chest Size (cm) Age Guide
11" 28cm 56cm 3-4yrs
11.5" 29cm 61cm 5-6yrs
12" 30cm 55cm 7-8yrs
12.5" 32cm 71cm 9-10yrs
13" 33cm 76cm 11yrs
13.5" 34cm 78.5cm 12yrs
14" 36cm 91cm 13yrs
14.5" 37cm 84cm 14yrs
15" 38cm 86.5cm 15yrs
15.5" 39cm 89cm  
16" 41cm 91cm
16.5" 42cm 94cm
17" 43cm 96cm
17.5" 44cm 99cm
18" 46cm 102cm
18.5" 47cm 104cm
19" 48cm 107cm