How accurate are shoe size conversions?

Our conversions are based on official international standards and are accurate within half a size. However, we recommend trying on shoes when possible as sizing can vary between brands.

Do shoe sizes differ between men and women?

Yes, there is typically a 1.5 size difference between men's and women's shoes. For example, a women's size 8 is equivalent to a men's size 6.5.

What if my size falls between two sizes?

If your measurement falls between sizes, we recommend going up to the larger size for comfort, especially for athletic shoes or boots.

Convert UK 3 to US (Women's) Shoe Size

Looking for the exact US size for a UK 3 Women's shoe? Use our shoe size calculator below to see the precise conversion chart. A UK 3 is a common shoe size in United Kingdom.

UK Women's

US Women's

Foot Length

22 cm

Size Converter

Select your current size and system

Gender

💡 Brand Check: Buying Nike or Adidas? They don't follow standard International sizing.Check the Brand Chart below to avoid returns.

Region

Size

Half sizes are rounded to the nearest 0.5

Converted Sizes

Converted Size

US Standard

All Regional Sizes

Reference Table

Complete size conversion chart

US	EU	UK	CM	AU (UK)	JP (CM)	CN (CM)	MX (CM)	BR
3	33	1	20	3	20	200	20	31
3.5	33.5	1.5	20.5	3.5	20.5	205	20.5	31.5
4	34.5	2	21	4	21	210	21	32
4.5	35	2.5	21.5	4.5	21.5	215	21.5	32.5
5	35.5	3	22	5	22	220	22	33
5.5	36	3.5	22.5	5.5	22.5	225	22.5	33.5
6	36.5	4	23	6	23	230	23	34
6.5	37.5	4.5	23.5	6.5	23.5	235	23.5	35
7	38	5	24	7	24	240	24	36
7.5	38.5	5.5	24.5	7.5	24.5	245	24.5	36.5
8	39	6	25	8	25	250	25	37
8.5	40	6.5	25.5	8.5	25.5	255	25.5	38
9	40.5	7	26	9	26	260	26	39
9.5	41	7.5	26.5	9.5	26.5	265	26.5	39.5
10	42	8	27	10	27	270	27	40
10.5	42.5	8.5	27.5	10.5	27.5	275	27.5	40.5
11	43	9	28	11	28	280	28	41
12	44.5	10	29	12	29	290	29	42

Frequently Asked Questions

🦶 How to Measure Your Feet

1. Trace Your Foot

The most accurate method for home measurement:

Diagram showing how to trace a foot for shoe sizing: place foot on paper, hold pen vertical, trace outline

Place a piece of paper on the floor against a wall.
Stand on the paper with your heel against the wall.
Hold a pen vertically (90°) and trace your foot outline.

2. Measure Length & Width

Use a ruler to measure the length from the heel line to your longest toe mark.
Measure the width at the widest part of your foot trace.
Pro Tip: Subtract 0.2 inches (5mm) from length to account for the pencil width.

👟 Fit Check: The Thumb Test

Is it the right size?

There should be about a thumb's width of space between your longest toe and the end of the shoe.
The heel should fit snugly without slipping.
The widest part of your foot should align with the widest part of the shoe.

More Tools Like This

Explore related conversion tools to find exactly what you need

UK 3 Women's by Brand

Brand sizing can differ from the standard chart. Here is how major brands size UK 3 Women's in US:

Brand	UK Size	US Size	Fit Note
Nike	3	4	Nike sizing leans towards the smaller side, particularly in specific models. Che…
Adidas	3	4	Adidas shoes generally run true to size, though some customers feel they might b…
New Balance	3	4	Typically consistent with sizing, but some feel that certain models can run narr…
Puma	3	4	Mostly true to size, but some models might fit a bit snug.
Vans	3	4	Generally true to size, but certain styles might fit differently.
Converse	3	4	Often considered to run larger. Many suggest going down half a size, especially …
Reebok	3	4	Generally runs true to size, but some users suggest buying a half size larger fo…
Asics	3	4	Usually runs true to size. Running shoes are well-regarded for consistent sizing…
Jordan	3	4	Jordan shoes (part of Nike) usually follow similar sizing patterns. Many fans fi…
Crocs	3	4	Crocs runs large - size down
Dr. Martens	3	4	Dr. Martens runs large - size down
Birkenstock	3	4	Birkenstock runs true to size
Hoka	3	4	Hoka runs true to size

Understanding UK to US Conversion

Shoe sizing can vary significantly between brands, but the international standard conversions provide a reliable baseline. When converting from UK to US, keep in mind:

US Sizes are based on the Brannock device system.
EU Sizes (Paris point) are based on centimeters (2/3 cm per size).
UK Sizes are similar to US but generally run 1 size smaller (e.g. US 10 ≈ UK 9).
CM/JP represents the actual foot length in centimeters, often considered the most accurate method.

Top Tip: If you are buying running shoes or boots, size up by 0.5 to allow for toe movement.