Is it better to go a size up or down in shoes?

Deciding whether to go a size up or down in shoes can significantly impact comfort and foot health. Generally, it’s better to go up half a size if a shoe feels slightly too small, especially if it’s a narrow fit, as your feet can swell throughout the day.

Why Shoe Size Matters: Understanding Foot Anatomy and Shoe Fit

Getting the right shoe size isn’t just about comfort; it’s crucial for preventing foot pain, blisters, and even long-term structural issues. Our feet are complex, and they change throughout the day and even over our lifetime. Understanding these nuances helps in making the best choice when trying on new footwear.

Your Feet Aren’t Static: The Impact of Swelling and Time

Did you know your feet can swell by up to half a shoe size during the day? This is especially true after periods of activity or in warmer weather. This natural swelling means that a shoe that feels perfectly snug in the morning might feel uncomfortably tight by the afternoon.

This is a key reason why many experts recommend trying on shoes later in the day. This ensures you account for your feet’s natural tendency to expand. Ignoring this can lead to discomfort and a poor fit.

The Difference Between "Too Tight" and "Too Loose"

When a shoe feels too tight, it often means it’s too short or too narrow. Going down a size in this scenario is rarely the solution. Instead, it exacerbates the problem, potentially causing bunions, hammertoes, and ingrown toenails.

Conversely, a shoe that’s too loose can lead to your foot sliding around. This causes friction, blisters, and can alter your gait, leading to knee or back pain. It also means you’re not getting the proper support the shoe is designed to offer.

When to Go Up Half a Size: Common Scenarios

There are several situations where choosing the next half size up is the wisest decision for your foot’s well-being. This often comes down to the specific shoe style and how your foot feels within it.

Narrow Shoes and Wide Feet

If you have naturally wider feet, or if a particular shoe model runs narrow, you might find yourself between sizes. In this case, opting for the larger size is usually the better choice. You can often mitigate a slightly larger size with thicker socks or insoles.

Trying to force a narrow shoe to fit by going down a size will only lead to pinching and discomfort. It’s far more effective to find a shoe that accommodates your width.

Accommodating Foot Swelling

As mentioned, feet swell. If a shoe feels a little snug but not painfully tight, consider if that snugness will become problematic later in the day. If it’s likely to, going up half a size can provide the necessary breathing room.

This is particularly important for athletic shoes or any footwear you plan to wear for extended periods or during physical activity.

Breaking in New Shoes

Some materials, like leather, can stretch and mold to your feet over time. However, you don’t want to rely solely on this. If a shoe is significantly tight from the start, even with the expectation of breaking in, it might be too small.

A shoe that’s slightly snug but not constricting is a better candidate for breaking in. If it’s already pressing on your toes or the sides of your feet, it’s likely the wrong size.

When to Consider Going Down Half a Size (Rarely)

Going down a size is a less common solution and usually indicates a different fit issue. It’s rarely about a shoe being slightly too big in length.

Shoes That Have Stretched Significantly

If you’ve owned a pair of shoes for a while, and they’ve stretched out considerably, making them feel too loose, then perhaps a smaller size in that specific model would have been better initially. However, for new shoes, this scenario is unlikely.

Mismatched Sizing on the Shoe Itself

Occasionally, a shoe might be mislabeled or have an inconsistent manufacturing size. If a shoe feels drastically too large, and you’re certain your foot size is correct, it might be worth trying a smaller size to see if it’s a manufacturing anomaly.

How to Properly Measure and Fit Shoes

The best way to avoid the "size up or down" dilemma is to ensure you’re starting with the correct measurement and fitting technique. This involves more than just glancing at the size label.

Accurate Foot Measurement

• Measure both feet: Most people have one foot slightly larger than the other. Always fit to the larger foot.
• Measure at the end of the day: This accounts for natural foot swelling.
• Wear the socks you’ll use: If you plan to wear thick socks with boots, wear them when trying on boots.

The "Rule of Thumb" and Beyond

A common guideline is to have about a thumb’s width of space between your longest toe and the end of the shoe. However, this isn’t the only factor.

• Width is key: Ensure the widest part of your foot fits comfortably in the widest part of the shoe.
• Heel slippage: Your heel shouldn’t lift excessively when you walk.
• Arch support: The shoe’s arch should align with your foot’s arch.

Common Shoe Fit Problems and Solutions

Understanding common fit issues can help you diagnose whether you need to go up, down, or simply find a different shoe.

Too Short vs. Too Narrow

• Too Short: Toes feel cramped, pressure on the tips of toes. Solution: Go up in length (half size).
• Too Narrow: Sides of the foot feel squeezed, especially at the ball of the foot. Solution: Look for wide sizes or a different brand known for wider fits.

Too Long vs. Too Wide

• Too Long: Foot slides forward, excessive space at the toe. Solution: Try a smaller size, or use insoles/heel grips.
• Too Wide: Foot slides side-to-side, shoe feels sloppy. Solution: Look for narrow sizes or use insoles.

A Comparison: When to Size Up vs. Size Down