Secondhand fit reference

Find the size that fits before you dig through the rack.

Measure a jacket you already love, lay it flat, and enter three numbers. We compare them against rough size ranges from several decades and label systems, then flag the risks.

Garment measurements

Measured flat, in inches. Chest is one side times two.

Likely fits by label system

Enter measurements above to see results. The example values load a common 1980s-style jacket.

Brand-by-decade sizing notes

Labels rarely mean the same thing across eras. These notes describe general patterns, not exact specs.

Era	Typical cut	What to expect
1950s to early 1960s	Trim, shorter body	Small chest, narrow shoulders. Sizes often run 2 to 4 numbers smaller than modern.
1970s	Boxy, longer body	Wide shoulders, generous chest. Letter sizes can look oversized.
1980s	Oversized, padded	Shoulder pads add width. Check shoulder seams before chest.
1990s	Relaxed to slim	Mixed range. Trust flat measurements over labels.
2000s onward	Closer to modern	Numeric and letter sizing more consistent, but slim fits are common.

Shrinkage risk by fabric

Untreated cotton and twill

Can shrink 3 to 5 percent in the first wash. Add room in the chest and sleeves before buying a tight fit.

Wool and tweed

Shrinks mostly in heat and agitation. Hand wash cold and dry flat to keep the size.

Denim

Can shrink 1 to 3 percent. Raw denim may stretch in the shoulders over weeks of wear.

Synthetic and nylon

Little shrink, but may not stretch. Trust the flat measurements.

Leather

Stretches with wear, especially at the shoulders and elbows. A snug fit often loosens.

Common mistakes

Trusting the tag letter without measuring the jacket.
Measuring a stretched or hanging garment instead of a flat one.
Forgetting that a shoulder seam placed off the shoulder changes the fit.
Buying a tight chest on untreated cotton without allowing for shrink.

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