FREE DELIVERY
on orders over £150
EXTENDED RETURNS
for Christmas
VISIT OUR WAREHOUSE
in London, N12. Contact us!
visit our warehouse
in london, n12. contact us!

ONE Greatness Within Tee

Original price was: £26.99.Current price is: £18.89.

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ONE

ONE Greatness Within Tee

Original price was: £26.99.Current price is: £18.89.

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Size Guide
Size Guide
Join our waiting list We will notify you when the product arrives back in stock. Please enter your email address below.

Summon the greatness within you with our Greatness Within Tee. Perfect for when you need that extra boost and motivation!

This is finished with the multilingual The Home of Martial Arts necktape and has a screen printed inner neck label for comfort.

Please check the size chart as sizes may differ from UK sizes. 
  • Dark Grey

Christmas Returns

Products can be returned up to Friday 16th January 2026. Terms and exclusions apply, please see below.

Delivery

Free delivery when you spend over £150 with a maximum weight of 30kg.

UK Standard delivery within the UK is £3.95

UK Express delivery within the UK is £6.95

All orders recieved before 12pm will be dispatched same day.

Returns

All orders can be returned within 14 days of purchase.

Please contact us first to recieve a returns authorisation. All items returned must be in perfect condition, unused, unwashed with their original packaging and still have their original tags attached. For more information please see our returns page here

For hygiene reasons mouthguards, groin guards, hand wraps and ankle supports cannot be returned unless the packaging is sealed and unopened.

  • Same day dispatch when ordering before 12pm
  • Free delivery on orders over £150
  • Extended returns for Christmas to 16th January 2026
  • Visit our warehouse in North Finchley, London, N12

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ONE

About ONE

Founded in 2011, ONE Championship is a Singapore based combat sports promotion that stages events across Asia featuring MMA, Muay Thai and Kickboxing. It presents itself as ‘The Home of Martial Arts’.

The ONE Championship apparel delivers authentic fan gear and ‘training to street’ designs. ONE brings top quality martial arts inspired apparel that have been technically designed with performance, comfort and style in mind.

Join our waiting list We will notify you when the product arrives back in stock. Please enter your email address below.

ONE Greatness Within Tee

Chest (cm)Waist (cm)Hips (cm)
X Small80 - 8868 - 7680 -88
Small88 - 9676 - 8488 - 96
Medium96 - 10484 - 9296 - 104
Large104 - 11292 - 100104 - 112
X Large112 - 120100 - 108112 - 120
XX Large120 -128108 - 116120 -128

To estimate the size you need please use the following chart to compare your measurements. Please note that this guide is an estimate only and cannot account for individual preferences.

If your body measurements for hips and waist correspond to two different suggested sizes, order the one indicated by your hip measurement.

HOW TO MEASURE
  • CHEST- Measure around the fullest part of your chest, keeping the measuring tape horizontal.
  • WAIST- Measure around the narrowest part (typically the small of your back and where your body bends side to side), keeping the tape horizontal.

  • HIPS- Measure around the fullest part of your hips, keeping the tape horizontal.

ONE Greatness Within Tee

Chest (cm)Waist (cm)Hips (cm)
X Small80 - 8868 - 7680 -88
Small88 - 9676 - 8488 - 96
Medium96 - 10484 - 9296 - 104
Large104 - 11292 - 100104 - 112
X Large112 - 120100 - 108112 - 120
XX Large120 -128108 - 116120 -128

To estimate the size you need please use the following chart to compare your measurements. Please note that this guide is an estimate only and cannot account for individual preferences.

If your body measurements for hips and waist correspond to two different suggested sizes, order the one indicated by your hip measurement.

HOW TO MEASURE
  • CHEST- Measure around the fullest part of your chest, keeping the measuring tape horizontal.
  • WAIST- Measure around the narrowest part (typically the small of your back and where your body bends side to side), keeping the tape horizontal.

  • HIPS- Measure around the fullest part of your hips, keeping the tape horizontal.