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Boys' Underwear
Boys' boxer trunks and boxer shorts in multipacks from Sock Stack, for school, sport and everyday wear. Choose from fitted cotton-stretch trunks, loose-fit woven boxers and fun printed designs, sized by age from toddlers to early teens.
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Before you buy
Boys' Underwear buying guide
Trunks or loose-fit boxers?
Fitted boxer trunks stay in place under school trousers and PE kit, and most boys find them easy to get on and off. Loose-fit woven boxers have a relaxed leg and a softer, roomier feel, which some boys prefer for sleeping and at home. Printed packs with football, army or gamer designs, or a different day of the week on each waistband, make getting dressed easier for younger children.
Fabrics
Most trunks here are 95% cotton and 5% elastane, which is soft and breathable with enough stretch to hold their shape. One pack uses 95% organic cotton with 5% elastane. The woven loose-fit boxers are a 65% polyester and 35% cotton mix, which is light and keeps its shape.
Sizing by age and waist
Sizes are listed by age, and several packs also give a waist measurement for each size. For example, one pack lists 5 to 6 years as a 23 to 24 inch waist and 13 years as a 28 to 29 inch waist. Measure round your son's natural waist and compare it with the chart on the product page. If he is tall for his age or between sizes, go up a size.
Washing multipacks
The packs here wash at 40°C, and most can be tumble dried. Wash dark colours separately, especially for the first few washes, and keep assorted packs together so all the pairs wear at the same rate.
FAQs
Boys' Underwear: common questions
What size boxers does an 8 year old boy wear?
Most 8 year olds wear 7 to 8 years. Check the waist measurement on the product page if he is between sizes.
Are boxer trunks or boxer shorts better for school?
Fitted trunks stay in place under uniform and PE kit, so many parents choose them for school days.
How many pairs of underwear does a child need?
Seven pairs covers a week, and a few spares help for PE days and slower laundry weeks.
Add kids' socks to the order, or browse boys' T-shirts and boys' fashion.
Still have a question? See Help and delivery or contact us.




