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Kids' Solid Colour Underwear

Big personalities. Favourite colours. Undies they’ll want to pick themselves. Knobby’s kids’ solid colour underwear brings a splash of personality to their first layer, with plain designs for school days, playground missions and weekend fun.

Explore boys’ Trunks and girls’ Bikinis in soft, smooth TENCEL™ Luxe. Let them choose a favourite shade, then check the available sizes and each product’s size guide for their fit. Less boring in the drawer. More fun getting dressed.

Kids’ Plain Underwear, Picked in Their Favourite Colours

When they have a favourite colour for everything, their undies can join in too. Knobby’s kids’ solid colour underwear keeps the design simple, with plain colour areas rather than an all-over graphic print. Let them help choose a shade, then check the product details before ordering.

The available range includes boys’ trunks and girls’ bikinis. Use the photos to compare the cuts and colours, and check which sizes are available in the pair they’ve picked.

Check Their Fit Before You Top Up

Children’s age labels are a useful starting point, but measurements help you choose more carefully. Compare your child’s measurements with the product’s size guide and read its fit details, especially after a growth spurt. Check the material information too if they have a favourite fabric.

Looking for more choice? Browse boys’ trunk underwear or explore girls’ underwear for the wider range. For a larger drawer top-up, take a look at kids’ underwear packs.

FAQs

What is kids’ solid colour underwear?

Kids’ solid colour underwear uses plain colour areas rather than an all-over graphic print. Product photos show the exact colours and design details of each pair.

Which kids’ styles are available?

This collection includes boys’ trunks and girls’ bikinis. Check the products above for the colours and sizes available in each style.

Should I choose my child’s size by age?

Use the age label as a starting point, then compare your child’s measurements with the size guide on the product page. Read the fit details too, particularly if they’ve recently grown or are trying a different style.

Can I return or exchange kids’ underwear?

Check Knobby’s returns policy before ordering for eligibility and conditions. If you’re unsure whether your purchase can be returned or exchanged, contact our support team before checking out.

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© KNOBBY AU 2026

At Knobby, we’re proud to work on the Country of the Kabi Kabi (Gubbi Gubbi) People in Chevallum. We honour their deep connection to this land, its waters and community, and pay our respects to Elders past, present and emerging.