Sizing Guide

Most shoe brands base their sizes on an average foot and make minor adjustments they call “wide.” That doesn’t work — and we know because the data proves it.

We analyzed millions of real female foot scans, focusing on both length and width.

We built our shoes to fit the 75th to 95th percentile width for each foot length — meaning they’re made for women who have consistently been ignored by traditional sizing.

  • Built from real foot-scan data, not outdated size charts

  • Width increases proportionally with length to maintain extra width

  • Fits women who are too wide for standard and most “wide” shoes

  • No squeezing, no breaking-in, no sizing up for width

Our sizing is based on length and width and follows EU sizing, which may differ from US sizes. We don’t use US sizing since it varies so drastically.

Please check your measurements and use our sizing tool or sizing chart to determine the most accurate size.

Size Chart

IN CM
Size Foot Length Foot Width
36 22.9 10.2
37 23.8 10.6
38 24.3 10.8
39 25.1 11.1
40 25.4 11.2
41 26.3 11.6
42 26.6 11.7

Widths shown are designed to fit ~75th–90th percentile, making our shoes extra wide.

Sizing FAQs

  • Use our Fit Guide to find your best size based on both foot length and foot width. Unlike most brands, we provide sizing guidance that goes beyond length alone.

    If you’re between sizes, we generally recommend sizing based on length first, as our shoes already provide the width most women need.

    Still unsure? Reach out — we’re happy to help.

  • You likely won’t need to anymore. Our shoes are already designed to accommodate wider feet, so many customers find they can finally wear their true length without discomfort.

  • US sizing isn't standardized—a size 8 varies wildly between brands. EU sizing based on centimeters is more accurate and consistent.

  • Most brands call a shoe "wide" when it's only 3–5 mm wider than standard.

    Our shoes are built from the ground up using custom lasts based on real foot-scan data from millions of women.

    Our widths align with the 75th percentile of width and are 8-12mm wider, meaning they fit the women who are most commonly underserved by traditional footwear brands.

  • Returns are completely free. We want your feedback to continue improving our fit, so please let us know if something feels off.

  • We focus on the sizes that best align with our fit data. Some styles may not include half sizes, but our width-inclusive design often eliminates the need to size up or down to compensate for fit.

  • Yes. We’re building thoughtfully and intentionally, guided by real customer feedback and fit data. New styles and updates will be released as we grow.

    Email us at martina@martina.shoes or drop a note here with specific requests - we want to hear from you!