Finding the right sandal size seems straightforward until you discover that your usual size feels completely wrong in a new brand. Unlike enclosed shoes that offer some flexibility through lacing, sandals demand precision. A poorly fitting sandal can cause blisters, foot fatigue, and even long-term issues like toe deformities or plantar fasciitis. This guide will help you navigate sandal sizing with confidence.
Why Sandal Sizing Is Different
Sandals present unique fitting challenges that enclosed shoes don't. Your foot is exposed, which means any overhang or gap is immediately visible and can affect both comfort and stability. The open design also means your foot isn't contained by the upper, so it can slide forward or sideways during walking.
Additionally, sandal sizing varies significantly between brands and styles. A size 9 in Birkenstock might feel very different from a size 9 in Havaianas. Some brands use European sizing, others use UK or US sizing, and the conversion between these systems isn't always consistent.
Always measure your feet in the afternoon or evening when they're at their largest. Feet naturally swell throughout the day, especially in warm weather.
How to Measure Your Feet Correctly
Before shopping for sandals, get an accurate measurement of your feet. Here's the proper technique:
- Stand on a piece of paper placed against a wall. Make sure you're standing, not sitting, as your foot spreads under your body weight.
- Mark the longest point of your foot (usually your big toe or second toe) and the back of your heel.
- Measure the distance between these two marks in centimetres.
- Repeat for both feet – most people have one foot slightly larger than the other. Always size for the larger foot.
- Measure your width at the widest part of your foot (typically the ball of your foot) for brands that offer width options.
Understanding Brand-Specific Sizing
Birkenstock
Birkenstock uses European sizing and their sandals are designed to fit with about 5-10mm of space at both the heel and toe. This extra room allows your foot to move naturally during walking. If you're between sizes, Birkenstock recommends sizing up. Their narrow and regular width options are also crucial – regular width suits most feet, while narrow is designed for slim, low-volume feet.
Havaianas and Rubber Flip Flops
Brazilian brands like Havaianas use Brazilian sizing, which differs from both US and European standards. They typically provide a conversion chart, but as a general rule, their sandals run slightly small. The toe post should sit comfortably between your first and second toes without causing irritation, and your heel shouldn't hang over the back edge.
Teva and Sport Sandals
Sport sandals with adjustable straps offer more flexibility in fit. However, the footbed length still matters. Teva sandals generally run true to size, but their adjustable straps can compensate for minor sizing variations. Ensure the heel cup cradles your heel properly and your toes don't extend beyond the front of the footbed.
- Measure your feet in the afternoon when they're largest
- Size for your larger foot
- Leave 5-10mm of space at heel and toe for most brands
- Your heel should never overhang the back of the sandal
- Consider width as well as length
Common Sizing Mistakes to Avoid
Even experienced shoppers make these errors when selecting sandal sizes:
- Ignoring width: Many people focus solely on length. If your foot feels cramped at the sides or hangs over the edges, you need a wider size or a brand with wider footbeds.
- Buying too small for aesthetics: Some people choose smaller sizes because they think it looks better. This leads to toe overhang, which is both uncomfortable and creates a tripping hazard.
- Not accounting for foot swelling: If you'll be wearing sandals in hot weather or for extended periods, your feet will swell. That perfect fit in an air-conditioned store might become painfully tight on a summer beach walk.
- Assuming consistency across styles: Even within the same brand, different styles may fit differently. A platform sandal might fit tighter than a flat sandal in the same size.
If your toes extend beyond the front of the sandal or your heel hangs over the back by more than a few millimetres, the sandal is too small. This isn't just uncomfortable – it can cause injuries from catching your toes or having unstable footing.
What About Half Sizes?
Not all sandal brands offer half sizes. If you typically wear a half size and the brand only offers whole sizes, here's guidance:
- For Birkenstock: Generally size up to the next whole size.
- For flip flops: Size up for a more relaxed fit, or size down if you prefer a snug feel.
- For sport sandals: The adjustable straps give flexibility, so either option can work – try both if possible.
Online Shopping Tips
Buying sandals online requires extra caution since you can't try them on first. Here are strategies to improve your success rate:
- Read reviews carefully: Look for comments about sizing running large or small.
- Check the return policy: Only buy from retailers offering free returns.
- Use the brand's size guide: Measure your feet and compare to the brand's specific chart, not a generic conversion.
- Order multiple sizes: If you're unsure, order two sizes and return the one that doesn't fit.
- Look for photos from reviewers: Real customer photos can show how the sandals fit on actual feet.
When to Replace Sandals Due to Sizing Issues
Sometimes sandals that once fit perfectly no longer do. Feet can change size over time due to weight changes, pregnancy, or simply aging. If your trusted sandals suddenly feel too tight or loose, it might be time to remeasure your feet rather than repurchasing the same size. Cork footbeds like those in Birkenstocks also compress over time, which can affect the fit after years of wear.
Getting sandal sizing right takes a bit of effort upfront but pays dividends in comfort throughout the Australian summer. With proper fit, your sandals should feel like a natural extension of your feet – comfortable, stable, and ready for whatever adventures await.