By Jenisha Jonchhe Researched and tested where possible Updated
Affiliate links: this guide links to Amazon UK. As an Amazon Associate, My Bra Size earns from qualifying purchases. It never changes the advice or the size we suggest.
What to search for on Amazon UK
Add your UK size to the search on Amazon (for example “34G”). Not sure of it? Use our bra size calculator first.
- 1
Seamless knit crop bra
A soft, stretchy one-piece bra that pulls on over your head. Light support and no lines.
- 2
Seamless bra with removable pads
Thin pads add shape and modesty; take them out on warm days.
- 3
Seamless bra sized by UK band and cup
Some seamless bras are sold in band and cup sizes rather than S to XL, which gives a closer fit for fuller busts.
As an Amazon Associate, My Bra Size earns from qualifying purchases. Links open Amazon UK; prices and stock are set by Amazon and its sellers. Search results change often, so a product appearing there has not necessarily been tested. Product photos, where shown, come from Amazon. How we handle affiliate links
A seamless bra is a soft bra knitted in one piece, with no seams, no wires and no hard edges. It sits almost invisibly under fitted tops and is one of the most comfortable bras you can wear.
How are seamless bras made?
Most are made on circular knitting machines that knit the whole bra as a tube, with denser zones where more hold is needed, such as under the bust. That is why there are no stitched seams to show through clothes.
Who are seamless bras best for?
- Smaller and mid busts that need light support.
- Lounging, travelling and sleeping. See our guide to sleep bras.
- Anyone who finds wires, hooks or lace uncomfortable.
If your bust is fuller and you want more lift, a T-shirt bra with moulded cups, or a non-wired bra with good support, will give more structure.
How to choose the size
Seamless bras are often sized S to XL, or by band size only. Start from your UK size; if you do not know it, our bra size calculator gives a starting size. Then use the maker’s size chart, which usually lists a band and cup range for each letter size. If your band and cup point to different sizes, choose by your band, because a loose band gives no support at all.
How should it feel?
The band should sit level and feel snug without rolling up. The fabric should cover your breasts without flattening them uncomfortably or leaving a ridge at the top. If the band rolls, the bra is probably too small.
Care
Wash cool in a mesh bag and dry flat. Heat breaks down the elastic yarns that give a seamless bra its stretch.
Questions people ask
What is the difference between a seamless bra and a T-shirt bra?
What size seamless bra should I buy?
Are seamless bras supportive?
Written by
Jenisha Jonchhe
Jenisha Jonchhe is a New York-based fashion writer and designer with academic training in fashion design. She writes research-led bra sizing and fit guides for UK shoppers.
Researched from brand and retailer size guides, and tested hands-on where possible. Search results on Amazon change often, so a product appearing there has not necessarily been tested. How we research and test
