Finding the right shoe size can feel strangely complicated—especially when you’re switching brands. One company’s “true to size” is another company’s “half size up,” and casual shoes are even trickier because materials, styling, and shape can change fit more than most people expect.
This casual shoe size converter helps you estimate your best size when moving between popular lifestyle brands. Choose your shoe type (sneakers, boots, sandals, dress shoes, or comfort shoes), then select your current brand and size to get a recommended starting point for your next pair.
For running shoes, use this running shoe brand calculator.
Use this casual shoe size converter to estimate your size when switching between lifestyle shoe brands. Choose a shoe type to see the most relevant brands, then select your current brand and size and the brand you’re switching to.
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Note: These recommendations are estimates based on typical fit differences. For best results, confirm with brand size charts and customer reviews. Casual shoe sizing can vary by model and materials.
Why casual shoe sizing varies so much
Even when two brands use the same size chart, the shoes may fit differently in the real world. A few of the most common reasons include:
- Toe box shape and width (especially noticeable in sneakers and comfort shoes)
- Leather vs. knit uppers (some materials stretch, others don’t)
- Brand “last” differences (the foot-shaped form used to build each shoe)
- Heel fit and arch support (small design differences can change your feel quickly)
- Model variation within a single brand (boots and sandals may fit differently than sneakers)
If you’re between sizes, the width option in the converter can help you decide whether you’re more likely to size up, size down, or stick with your usual size.
How to use this converter
Start with the shoe type you’re shopping for, then select your current brand and your usual U.S. size. Choose the brand you’re switching to, and click the button for a recommended size estimate.
The result is designed to be a practical starting point, especially if you’re buying online.
Tips for getting the best fit online
If you want the highest chance of nailing the fit on the first try, here are a few quick habits that help:
- Try to measure your feet later in the day, when they’re slightly expanded.
- Compare your recommended size with the brand’s official sizing chart when possible.
- Check whether your target model is known for running narrow, wide, or short.
- Look at customer reviews specifically from people who mention fit.
- If you’re buying boots, consider sock thickness and whether you’ll use insoles.
Common fit problems and what they often mean
If your shoes “almost” fit, the issue is often easy to interpret.
If your toes feel cramped, you may need a wider width or a half-size up.
If your heel slips but the toe box feels fine, you may need a different model or a more secure lacing pattern.
If the shoe feels short, you may be running into a brand that tends to fit smaller, especially in casual styles.
A quick note about accuracy
This tool provides estimated recommendations based on common brand fit patterns. It can’t account for every model difference, foot shape, or material change. Some shoes (especially boots and comfort styles) vary widely even within the same brand.
If you want the most accurate outcome, treat the converter as your “best starting size,” then confirm with brand sizing charts and reviews whenever possible.
Shop by brand (optional)
If you want to browse shoes by brand after you get your recommendation, you can use the shopping link in the calculator to view results on Amazon or use this button to use Amazon’s search features.
