Parcel planning · Shopping
Record measurements and sizes without guessing
A size is a claim, not a measurement. Record both: what the chart says, what you measured, and how much room the difference leaves you. That is what makes a size choice reviewable instead of hopeful.
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Two kinds of measurement
Body measurements describe you. Garment measurements describe the item laid flat. Most sizing mistakes come from mixing the two: your chest circumference compared against a garment's pit-to-pit width, or your foot length compared against a shoe's outer sole length.
Give each its own block in the sheet. The body block changes rarely — measure once, note the date, reuse it. The garment block is per item, and it must include the measurement method the seller used: flat, stretched, or on a form.
Keep the units visible
Write the unit into the column header, not into the number. "Chest flat — in" is unambiguous. "Chest: 21.5" is not, because 21.5 inches and 21.5 centimeters describe two very different garments.
| Record | Source | Unit to log | Typical gotcha |
|---|---|---|---|
| Body chest | Tape measure, relaxed | in or cm | Measured over a thick shirt |
| Garment chest flat | Seller's chart or your own measure | in or cm | Chart shows half-chest, not full |
| Sleeve length | Shoulder seam to cuff | in or cm | Measured from collar instead |
| Inseam | Chart or existing pair of pants | in or cm | Compared against total length |
| Foot length | Tape measure, heel to toe, standing | in or cm | Measured seated, foot shorter |
When a chart lists both, keep the original value and the converted value, and label the conversion as yours. Converting 21.5 inches to 54.6 centimeters is arithmetic; treating that number as the seller's specification is a different claim entirely.
A worked jacket example
Say you are adding a wool overshirt for fall commuting. Your body chest is 40 in (101.6 cm), and you want room for a light sweater underneath. The listing chart gives a flat chest of 22.5 in (57.2 cm) for size M, which corresponds to a 45 in full chest — roughly 5 in of ease.
Record that reasoning in the notes: "22.5 in flat = ~45 in full; 5 in over 40 in body; acceptable for layering." If the chart instead says "chest 22.5 in" without explaining flat versus full, do not convert it. Ask, or leave the row open.
Example, not a guarantee: the numbers above are illustrative. Two brands can both label a garment "M" and differ by 2 in of chest. Never assume that a size label travels between brands.
Shoes and conversion charts
For footwear, log three values: your measured foot length, the US size you normally wear in that category, and the conversion the listing actually shows. US men's, US women's, UK, and EU sizing do not share one universal formula, so a conversion is only as good as the chart it came from.
If a listing shows US 9 next to EU 42, copy both. Then add your own note: "EU 42 = 26.5 cm last, my foot 26.2 cm." When the parcel arrives, that note tells you whether the issue was the conversion or the fit.
Width deserves a field of its own for sneakers and boots. A shoe that is the right length and too narrow will not break in enough to be comfortable on a commute.
What to leave open
Write open questions as questions, not adjectives. "Runs small?" is not recordable; "Is the 22.5 in chest measured flat?" is. Each open question should also have an owner action: ask the seller, check the inspection photos, or compare against an item you already own.
The inspection photo checklist covers how to confirm a size tag in a photo, and the comparison guide shows how to line two size options up against each other. Before ordering, also copy the exchange conditions into the row — the purchase conditions record explains which sentences are worth keeping.
Finally, log the date you measured. Bodies change; charts change faster. A measurement record without a date is a guess with good handwriting.
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