Capture how it actually fit, not just the label
Save the size on the label (S/M/L, W31 L30, 27 cm, US 9.5 and more) and mark the overall fit in a tap: Fits well, Some issues, or Doesn't fit.
Then pinpoint the details, like a loose waist, long sleeves or shoes that pinch at the sides. Each part is tight / just right / loose, or short / just right / long.
Brand names are optional (unbranded items go under "No brand"). You can also note the garment's measurements (length, chest, waist, inseam and more), with diagrams showing how to measure. Add up to two photos per item (the size tag and the whole piece), plus notes and the product page URL.