A women’s size 10.5 generally translates to a men’s size 9 or 9.5 in the U.S., though this varies by brand and shoe style. 

This guide will cover everything you need to know about converting shoe sizes across genders, including width differences, brand-specific sizing, and tips for finding your ideal fit.

Women's Size 10.5 to Men's Shoe Conversion

Women’s shoes are 1.5 sizes larger than men’s shoes for the same foot length. So, a women’s size 10.5 is usually equivalent to a men’s size 9, but for some brands, this could shift to a men’s 9.5 due to varying sizing standards.

• Standard Conversion: A women’s 10.5 typically equals a men’s size 9.
• Alternative Systems: Certain brands, like Adidas, may align a women’s 10.5 with a men’s size 9.5 due to differences in sizing methods.

When shopping online, always refer to each brand’s size chart and, if possible, customer reviews for sizing advice.

Why Do Women's and Men’s Sizes Differ?

The discrepancy between women’s and men’s sizes lies in two main factors: length and width. Men’s shoes are designed with a broader and sometimes slightly longer structure. 

This additional width can affect how well a shoe fits when switching between men’s and women’s styles.

1. Common System: A women’s 10.5 equals a men’s size 9.
2. Customary System: Here, a women’s 10.5 aligns with a men’s 9.5. Brands like Adidas and TOMS often use this approach.

Differences in Width Between Men’s and Women’s Shoes

When switching from women’s to men’s shoes, remember that men’s shoes are usually wider. This can impact comfort if you have narrower feet. For the best fit:

• Medium Width (Women’s): Consider going down half a size in men’s shoes.
• Wide Width (Women’s): Try a medium width in men’s.
• Extra Wide Width (Women’s): A wide men’s shoe may be best.

Brand-Specific Sizing for Women’s 10.5 in Men’s Shoes

Nike

Nike's sizing is generally spot on, offering a reliable fit across a wide range of unisex options, which I find really convenient. 

For example, a women’s size 10.5 in Nike translates to a men’s size 9, so it’s easy to find the right match if you're swapping between men’s and women’s sizes. 

Nike even goes up to a men’s size 18 in their unisex range, which is equivalent to a women’s 19.5, catering to those with larger or hard-to-fit feet. 

Another great perk? Nike’s return policy is super flexible—they provide free returns within 60 days, even if you’ve already worn the items. 

Allbirds

Allbirds has made a name for itself with its sustainable, ultra-comfortable casual footwear, and their unisex styles make them versatile across gender lines. 

While most Allbirds shoes don’t come in half sizes—which can be a bit limiting—the sizing is fairly adaptable. For instance, a women’s size 10.5 in Allbirds corresponds to a men’s size 9. 

Their unisex range goes up to a men’s size 14 (or a women’s 15.5), so there are options even for larger sizes. 

Plus, Allbirds offers a 30-day wear test with free returns, letting you try them out without any risk. 

Veja

The French brand Veja brings a stylish edge to sustainable sneakers, and their unisex sizing makes them even more appealing. 

Unlike typical U.S. sizing, Veja uses European measurements, so a women’s 10.5 translates roughly to a men’s size 8.5. Their unisex range goes up to size 49 EU, covering a wide variety of fits for both men and women. 

Since Veja recommends using European sizing rather than converting from U.S. sizes, it’s helpful to check specific style suggestions as certain shoes may fit differently. 

Cariuma

Cariuma has built a reputation for eco-friendly materials and simple, straightforward unisex sizing. For instance, a women’s size 10.5 in Cariuma is equal to a men’s size 9, making it easy to find the right fit across styles. 

Their range extends up to a women’s 14.5, accommodating a wide variety of sizes. The fit is generally consistent throughout their unisex options, but if your size is out of stock, you can sign up for restock alerts.

TOMS

TOMS is known for its versatile, casual footwear, especially in its popular canvas styles that work well across genders. 

For example, a woman's size 10.5 in TOMS corresponds to a men’s size 9.5, making it easy to find the right fit. Their unisex options go up to a men’s size 14, which matches a women’s size 15. 

One thing to keep in mind is that TOMS shoes don’t always stretch as much as you might expect, so if they feel snug, it’s a good idea to go up a size. 

European and UK Sizing Differences

In European sizes, the conversion is simpler because men’s and women’s shoes share the same length. However, men’s shoes are typically wider.

• Women’s 10.5 US: Roughly equivalent to size 42.5 EU.
• Width Differences: European men’s shoes may feel roomier due to width, so check each brand’s specific sizing.

For UK sizes, the difference is less about the number and more about width, just like in Europe.

• Women’s 10.5 US: Converts to 8.5 UK.
• Men’s Width: Wider than UK women’s shoes, so size down if you have narrower feet.

Tips for Choosing the Right Size When Shopping Across Genders

When shopping for men’s shoes to match your women’s size, here are some practical tips to keep in mind:

• Check Reviews: Look for comments on width and overall fit, as these can vary.
• Use Brand-Specific Charts: Each brand may interpret sizes differently, so consult their unique size guides.
• Try a Wear Test: Brands like Nike and Allbirds offer try-before-you-commit policies.
• Compare Widths: If you have a wide or narrow foot, adjusting the size accordingly will be helpful.
• Sign Up for Restock Alerts: If your size isn’t available, many brands offer notifications for restocking.

 Takeaway

With these insights, finding the right shoe size when shopping across genders should be simpler and more straightforward. Remember to focus on the brand’s sizing guide and customer feedback, and don’t hesitate to reach out to customer support if you need more assistance.