Size Conversion Chart

Features

• Four clothing charts: men's tops, women's tops, men's shoes, women's shoes
• China, international, EU, US, UK and Japan sizes cross-referenced
• Shoes also mapped to foot length in centimetres — the only objective measure
• Crochet hooks in three systems (US letter such as `G/6`, millimetres, UK number), written out row by row rather than derived
• Bra sizing from two measurements: the cup comes from the bust minus the underbust, one inch per cup, with US, UK and EU output
• Range matching for Chinese size codes (the chart says 165-170/88-90 and 170/88A still hits)
• The one-size-up row is included, so going up is an informed choice
• Typing a category word such as "men shoes" or "crochet" lists the whole chart
• Tolerant input: the suffixes and country prefixes people actually type are accepted
• Every size sits in one searchable dropdown, grouped by chart with all systems shown side by side

How to use

1. Type the size you normally wear (any system), or browse the dropdown by chart
2. The matching row appears with every system filled in
3. For hook sizes pick "Crochet hooks"; for a bra pick "Bra" and enter the bust and underbust
4. To see a whole chart, type the category, e.g. "men shoes"
5. Cross-check against the brand's own chart before ordering

FAQ

Are these numbers accurate?

They are the commonly published conversions, not a standard — clothing sizes have no international standard. The same "EU 38" differs by a step between brands, and shoes more so: the same 26 cm foot may be a 41.5 or a 42 depending on the maker. So the chart answers "given what I usually wear, roughly what does that become elsewhere", and you should still read the brand's own chart — especially its centimetre measurements. That is why foot length is listed here: it is the objective number.

How do I measure my foot length?

Measure in the evening (feet swell slightly over a day), wearing your usual socks and standing straight with your heel against a wall. Mark the tip of your longest toe and measure the distance — both feet, and take the larger one. Note that this is foot length, not shoe insole length: insoles are usually 0.5–1 cm longer, because your foot slides forward and back as you walk. That is also why foot length gets its own column here — the "insole length" a seller quotes is not the same number you measured.

Why can't I just pick a bra letter?

Because a cup is a difference, not an absolute size. The bust (fullest point) minus the underbust (snug, under the bust) gives roughly 1 inch for an A, 2 for a B, 3 for a C, and so on — so two numbers are needed to compute it. Letting you pick "34B" would mean guessing both your measurements and whether you wrote them in the right order. ⚠️ The systems also disagree: the US writes DD where the EU writes E, and the band is derived differently (the EU rounds the underbust up to the next multiple of 5), so US, UK and EU are all shown — check against the market you are buying in.

Why don't crochet hook sizes convert into one another?

Because there is no derivable relationship between the three systems. The US uses a letter plus a number (`G/6`) with bare numbers such as `7` mixed in; the millimetre figures are not evenly spaced (2.25, 2.75, 3.25…); and the UK numbers run the other way (a larger millimetre figure gets a smaller number), with old sizes such as `0`, `00` and `000`. Approximating one from another with an offset gets a row or two quietly wrong in the middle — and one hook size changes the tension by a whole step. So the table is written out row by row.

How do I read a Chinese size code like "170/88A"?

Two numbers and a letter: 170 is height in centimetres, 88 is chest circumference in centimetres for tops (waist for trousers), and A is the body type — A for standard, B for heavier, C for heavier still, Y for slim. That middle number is a body measurement (taken on you, not the garment) rather than a finished garment size. Note that the China column in the shoe chart is a different system (roughly the foot length in centimetres) and has nothing to do with size codes.