Size Guide
Customer satisfaction is key and we want to ensure that your Mystery Champions shirt fits upon arrival.
As avid football shirt lovers ourselves we know that there is nothing worse than opening up your Mystery Shirt - loving the shirt - but unable to fit in the shirt!
As we stock shirts from all different manufacturers and brands sizes may differ dependent on the specific brand.
We have put together this generic guide to help you to make your shirt size selection. *Please note, this is only a guide*
Product measurements
Product measurements may vary by up to 2″ (5 cm).

A Length
Place the end of the tape beside the collar at the top of the tee (Highest Point Shoulder). Pull the tape measure to the bottom of the shirt.
B Chest
Measure yourself around the fullest part of your chest. Keep the tape measure horizontal.
C Sleeve length
Place the end of the tape at the center back of the collar, then pull the tape measure along the top seam of the sleeve. When you get to the shoulder hold the tape in place at the shoulder and continue to pull down the sleeve until you reach the hem of the sleeve.
SIZE | LENGTH (inch) | WIDTH (inch) | SLEEVE LENGTH (inch) |
S | 28 | 18 | 15 ¾ |
M | 29 ¼ | 20 | 17 |
L | 30 ¼ | 22 | 18 ¼ |
XL | 31 ¼ | 24 | 19 ½ |
2XL | 32 ½ | 26 | 20 ¾ |
3XL | 33 ½ | 28 | 22 |
SIZE | LENGTH (cm) | WIDTH (cm) | SLEEVE LENGTH (cm) |
S | 71.1 | 45.7 | 40.0 |
M | 74.3 | 50.8 | 43.2 |
L | 76.8 | 55.9 | 46.4 |
XL | 79.4 | 61.0 | 49.5 |
2XL | 82.5 | 66.0 | 52.7 |
3XL | 85.1 | 71.1 | 55.9 |
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1. CHOOSE YOUR SIZE
Select your shirt size, with sizes ranging from XS - 3XL.
We recommend picking the same size as your previous football shirts. -
2. BUILD YOUR ORDER
In checkout tell us which teams or colours you wish to avoid so you get the perfect mystery football shirt!
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3. ENJOY YOUR SHIRT!
Our experts with the help of AI will hand pick your shirt to perfection & ship straight to your door!