Sock Size Calculator
Find your sock size from shoe size or child age with this free sock size calculator. US sock size chart for men, women, and children with general size labels.
About This Calculator
Finding the right sock size is essential for comfort, whether you are buying everyday socks, athletic socks, or dress socks. Our free online sock size calculator helps you determine the correct US sock size and general size label (Small, Medium, or Large) based on your shoe size or your child's age. Simply select your gender or age group, enter your shoe size in US, UK, or EU sizing, and get an instant recommendation.
The calculator uses standard sock size conversion formulas to map shoe sizes to sock sizes. For adults, shoe sizes are converted to foot length in inches using the international barleycorn measurement system. US sock sizes are then determined from the foot length: men's shoe sizes 4-7.5 map to sock size 9-11 (Small), 8-12.5 to 10-13 (Medium), and 13+ to 14+ (Large). Women's sizes follow a similar chart with slightly different shoe size ranges due to the separate US women's sizing system. For children, the calculator supports both shoe size input (in US, UK, or EU systems) and age input in years or months, covering sizes from Newborn to Medium across age ranges up to 10 years old.
How to Use This Calculator
Start by selecting Men, Women, or Child from the dropdown. For adults, choose your sizing system (US, UK, or EU), enter your shoe size, and click Find Sock Size. For children, you can either enter their shoe size (with system selector) or switch to By Age mode and enter their age in years or months. The result displays the recommended US sock size range, the general size label, and a chart showing the applicable size ranges. Use the breakdown section for a clear explanation of your recommendation.
Regional Notes
India: Most Indian shoe brands use UK sizing. Common men's shoe sizes range from UK 7 to UK 11, which typically corresponds to US sock size 10-13 (Medium). For children, Indian brands often use UK or EU sizing, both supported by this calculator. General sock sizes (S, M, L) are more commonly used in India than numerical US sock sizes.
United States: The US uses its own numerical sock sizing system based on foot length in inches. US sock sizes are sold as ranges like 9-11 (Small), 10-13 (Medium), and 14+ (Large). Most American sock brands use these numerical ranges alongside general labels. Men's common shoe sizes (7-13) typically fall in the Medium range, while women's common sizes (6-10) typically fall in the Small range.
United Kingdom: UK sock sizing typically uses general labels (Small, Medium, Large) rather than numerical ranges. UK shoe sizes 3-7 roughly correspond to Small, 7-12 to Medium, and 12+ to Large. Children's sock sizes in the UK commonly use age ranges, making our age-based input option particularly useful for UK parents.
Frequently Asked Questions
How do I find my sock size from my shoe size?
Select your gender (Men or Women), choose your sizing system (US, UK, or EU), enter your shoe size, and click Find Sock Size. The calculator converts your shoe size to the equivalent US sock size range and general size label. For men, US shoe sizes 4-7.5 correspond to sock size 9-11 (Small), 8-12.5 to 10-13 (Medium), and 13+ to 14+ (Large). For women, US shoe sizes 5-10 correspond to sock size 9-11 (Small), 10.5-13 to 10-13 (Medium), and 14+ to 14+ (Large).
What sock size is US shoe size 9 for men?
A US men's shoe size 9 falls in the medium sock size range. US men's shoe sizes 8 to 12.5 typically require US sock size 10-13, which corresponds to Medium (M) in general sizing. This applies to most standard sock brands.
How do I find sock sizes for children?
Select Child from the gender dropdown, then choose By Shoe Size or By Age. For shoe size input, enter the child's shoe size in US, UK, or EU sizing. For age input, enter the child's age in years or months. The calculator maps to children's sock sizes: Newborn (0-3 months), Infant (3-12 months), Toddler (1-2 years), X-Small (2-3 years), Small (3-7 years), and Medium (7-10 years). Children over 10 typically transition to Small Adult sizes.
What is the difference between US sock size and US shoe size?
US sock sizes are based on foot length in inches and use a different scale than US shoe sizes. Sock sizes are typically broader ranges (e.g., 9-11, 10-13, 14+) while shoe sizes are more precise. A US sock size 9-11 fits men's shoe sizes 4-7.5, and 10-13 fits 8-12.5. Sock sizes also use general labels: Small (S), Medium (M), and Large (L), which are commonly used outside the US.
Are UK and EU sock sizes different from US sock sizes?
Sock sizing varies by region. The US uses numerical sock sizes based on foot length in inches (e.g., 9-11, 10-13, 14+). The UK and EU typically use general sizing labels (Small, Medium, Large) rather than numerical sock sizes. This calculator converts your shoe size from any system (US, UK, or EU) to determine the correct US sock size and general size label, making it useful for international online shopping.
What size socks should I buy if my shoe size is between sizes?
If your shoe size falls at the boundary between sock size ranges, we recommend choosing the larger sock size for a more comfortable fit. Socks are designed to stretch, and a slightly larger size will be more comfortable than one that is too small. For example, if you are a men's US size 7.5, you are at the upper end of Small (9-11), but you might prefer Medium (10-13) for a roomier fit.
Do men's and women's sock sizes use the same chart?
No, men's and women's sock sizes use different shoe size ranges due to the difference in the US shoe sizing systems. Men's shoes use the formula 3 x foot length (inches) - 22, while women's use 3 x foot length - 21. This means a women's US size 8 corresponds to a different foot length than a men's US size 8. However, the resulting US sock size ranges (9-11, 10-13, 14+) are the same for both; only the shoe size mapping differs.
Can I use this calculator for compression socks?
This calculator provides general sock sizing based on shoe size or age. Compression socks often require more precise measurements, including foot length, calf circumference, and ankle circumference. While the general sock size from this calculator can be a starting point, always refer to the specific compression sock brand's sizing chart, which may use different ranges and require additional measurements.