Shoe Size Converter to Adjust Between Shoe Brands

Last Updated on May 7, 2026

Shoe sizes vary significantly between brands because companies build shoes on different lasts, toe box shapes, cushioning systems, and fit profiles. A men’s size 10 in Nike may feel noticeably tighter than the same size in New Balance, Brooks, or HOKA. For example:

• Nike often fits narrow through the forefoot and may feel short for runners with wider feet.
• Converse Chuck Taylor models frequently run long and flat, leading many buyers to size down.
• Brooks and New Balance are known for accommodating wider feet and higher-volume toe boxes.

If you’re shopping for a new pair of shoes and are unsure how the fit compares, use our Shoe Size Converter below (click to scroll there) to find your ideal match. Brands include running shoes, basketball shoes, casual footwear and formal shoe brands to help you get a great fit when you are switching from one brand to another and want a perfect fit.

Our shoe size converter helps compare sizing differences between major footwear brands, including Nike, Adidas, ASICS, Brooks, HOKA, Converse, New Balance, Puma, and more.

How to Use the Shoe Size Converter

To use the shoe size converter, start by selecting the brand you currently wear most often. Enter your usual U.S. shoe size, then choose the brand you want to switch to. The calculator will estimate the closest equivalent size based on common fit differences reported by wearers and footwear retailers.

Steps to follow:

1. Select your current shoe brand from the dropdown list.
2. Enter your current shoe size (U.S. sizing).
3. Choose the brand you’re switching to from the dropdown.
4. Click “Find My Size” to get an estimated size recommendation.

Pro Tip: If you’re between sizes or have a unique foot shape, checking user reviews or trying shoes in-store first can be helpful.

Common Shoe Fit Problems and How to Fix Them

Shoe sizing can vary widely between brands due to differences in lasts, cushioning systems, materials, and overall construction. Our fit recommendations are based on common sizing patterns, retailer guidance, manufacturer information, and real-world wearer feedback. Keep in mind that foot shape, sock thickness, orthotics, and how you plan to use the shoes can all affect how a pair fits.

If you have wide feet, brands such as New Balance, Brooks, Altra, and Keen are often recommended because they typically offer roomier toe boxes and wider width options. These brands are popular with walkers and runners who need extra forefoot space or all-day comfort.

For narrow feet, Adidas and Puma frequently provide a more streamlined fit that can feel more secure through the midfoot and heel. Many people with slimmer feet find these brands reduce unwanted movement inside the shoe.

If arch support is a priority, HOKA and ASICS are commonly chosen for their supportive midsoles and compatibility with orthotics. Many walking and running models from these brands are designed to improve comfort during long periods on your feet.

Leather shoes can also fit differently from athletic footwear. Brands such as Allen Edmonds and Dr. Martens may feel firm or snug initially, but genuine leather often softens and molds to your feet over time as the shoes break in naturally.

Try the Shoe Size Converter Now

Use the tool below to compare sizing across brands and find the best fit before you buy.

Use this running shoe size converter to estimate your size when switching between brands. Select your current brand and size, choose the brand you’re switching to, and pick your gender and width for a more accurate recommendation.

Note: These recommendations are estimates based on typical fit differences. For the best result, confirm using the brand’s official size chart and customer reviews.

Shop for brands on Amazon using the links below. We have also identified the top running shoe models for each brand.