Guide 04 · Sizes & Categories
Oopbuy Spreadsheet Sneaker Sizing: What to Check
For sneaker sizing in an Oopbuy spreadsheet, measure both feet at the end of the day to get length and width in inches, then compare those numbers against the size guide for each specific style. Treat the printed label as a starting point, not a promise that the fit will be identical across brands.
Measure foot length and width
- Stand on a sheet of paper with your heel against a wall.
- Mark the longest toe and measure heel to mark in inches.
- Measure the widest part of the foot at the ball.
- Repeat for the other foot and use the larger number.
Measure late in the day, because feet spread slightly after walking. Record both numbers in the sheet so you never have to repeat the process for every candidate.
Label size versus measured size
| Signal | What it tells you | Reliability |
|---|---|---|
| US label size | A rough starting point | Low across brands |
| Foot length in inches | Direct physical match | High |
| Foot width | Room in the forefoot | High, often ignored |
| Style fit notes | Runs small / large | Medium, verify per style |
A common mistake is converting one brand's size to another by a fixed rule. Because lasts differ, the same number can fit differently, so always read the guide attached to the exact style you are considering.
Fit notes worth adding per style
- Whether the style runs narrow, standard or wide.
- Whether the upper is leather, knit or mesh.
- Whether the insole is removable.
- Whether the toe box is described as roomy or snug.
- The date you confirmed the size guide.
Bags and accessories use volume rather than fit, so continue with comparing bags and accessories, and revisit clothing size comparison if the same order includes apparel.
Quick answers
Should I size up for wide feet?
Use your measured width first. If the style is described as narrow and your foot is wide, note that before deciding rather than guessing a size.
Do sizes match across brands?
Not reliably. Compare the style's own size guide to your measured length and width instead.
What if only a label size is given?
Mark the item as waiting to confirm and look for a size guide, or measure a pair you already own for reference.