You found a pair of shoes you love. The style is perfect, the price is right — but something about the fit is just a little off. So you do what most of us do: you wonder if you should go up a half size.

Here's the thing, though. A lot of the time, sizing up isn't actually the answer. What you really need is a different width.

These two adjustments solve completely different problems and mixing them up is one of the most common reasons women end up with shoes that still don't feel quite right. If you've never dug into how shoe widths actually work, our Complete Women's Shoe Width Guide is a great place to start. But for now, let's focus on the core question: size up or change width?

First, Why Do Shoes Feel Wrong in the First Place?

Before we get into the size-vs-width question, it helps to understand that shoes have two dimensions that affect fit: length and width. Most of us think about length automatically (that's your standard shoe size), but width is just as important — and it varies a lot more than most people realize.

Width refers to how much room there is across the ball of your foot. If you're unsure what the width letters on shoe boxes actually mean, this breakdown of shoe width letters covers the full scale — from slim AA all the way through EE extra wide. If you've only ever bought medium-width shoes, there's a good chance you've been in the wrong width your whole life without knowing it.

Signs You Need a Different Width (Not a Bigger Size)

Width is usually the culprit when:

• Your toes have plenty of space lengthwise but the sides of your feet feel squeezed or cramped
• You see the leather or fabric bulging slightly over the sides of the shoe
• Your feet spill over the insole when you look down
• You feel pressure or pinching across the ball of your foot — not the toes
• Your little toe is always rubbing against the side of the shoe
• The heel fits fine, but the front feels tight

If any of these sound familiar, going up a half size won't fix it — the toe box will just get longer while the width stays the same. What you actually need is a wide width shoe.

The reverse is also true: if you have narrow feet, medium-width shoes can feel sloppy and loose even when the length is right. Our guide on how to know if you have narrow feet walks through the exact signs to look for — including the heel slippage that so many narrow-footed women mistake for a sizing problem.

Signs You Should Actually Size Up

Sizing up (in length) makes sense when:

• Your toes feel cramped or are pushing against the front of the shoe
• You notice redness or blisters on the tips of your toes
• Your longest toe is right at — or past — the end of the insole
• The shoe feels fine width-wise but tight in the toe area
• You're between sizes and tend to run large

One important thing to keep in mind: feet swell throughout the day, especially if you're on them for long periods. If shoes feel fine in the morning but uncomfortable by afternoon, length could be a factor — but width often is too, since swelling affects the ball of the foot as much as the toes.

What Happens When You Size Up to Compensate for Width

This is where a lot of people get into trouble. If your feet are wide and you size up to get more room, you'll end up with extra length you don't need — and that creates its own set of problems:

• Your heel starts slipping out of the shoe with every step
• You're gripping with your toes to keep the shoe on
• The shoe bends and flexes in the wrong place, which can cause arch pain
• You're more likely to trip or catch the front of the shoe

It's a short-term fix that usually creates more issues than it solves. If wide feet are what you're dealing with, see our post on how to know if you have wide feet — it covers the signs in detail and explains what wide-width shoes are actually built differently to accommodate.

How to Measure Your Width at Home

You don't need a Brannock device to get a sense of your width. Here's a simple method:

• Stand on a piece of paper and trace your foot with a pencil held straight up and down
• Measure the widest part of the tracing (usually across the ball of your foot)
• Compare to a shoe width chart — our Complete Women's Shoe Width Guide includes measurement ranges for each width category

Keep in mind that feet are often slightly different sizes from left to right — fit to the larger foot, and use an insole or pad in the other shoe if needed.

A Note on Shoe Style and Construction

Width fit can also vary by shoe style, even within the same brand. A pointed-toe pump naturally has less room in the toe box than a rounded-toe flat. A stiffer leather shoe will feel tighter at first than a softer suede. If you're going between styles, keep this in mind rather than assuming your width has changed.

The Bottom Line

If something about your shoe fit feels off, resist the urge to just grab the next size up. Ask yourself where the discomfort is coming from. Length problems live in the toes — the front of the shoe. Width problems live in the middle — across the ball of the foot and sides.

At Marmi, we carry an extensive range of widths — narrow, medium, wide, and extra wide — so you can find the fit that actually works for your foot, not just a size that's close enough. Browse our narrow shoes or wide shoes collections to find your fit, or explore all shoes with the width filter to narrow things down.