One of the biggest pitfalls for new thrift hunters and online buyers is assuming tag sizes from 1970 or 1980 match today's vanity sizing standards. A vintage 1970s tag labeled "Size 14" actually corresponds to a modern US Women’s Size 6.
Decade Sizing Shifts Compared
| Garment Era | Tag Size Labeled | Modern Equivalent Fit | Key Characteristics |
|---|---|---|---|
| 1960s Mod Era | Size 12 | Size 2 - 4 (XS) | Narrow bust lines, non-stretch cottons. |
| 1970s Boho / Disco | Size 14 | Size 6 (S) | High armholes, long hemlines. |
| 1980s Power Dressing | Size Medium | Size Large (Oversized) | Padded shoulders, boxy silhouette. |
| 1990s Grunge | Size Large | Size Large / XL | Relaxed drops, wider collar cuts. |
How to Take Accurate Lay-Flat Measurements
When thrifting, never rely on marked tag numbers. Lay the garment flat on a smooth surface and measure with a non-stretch flexible measuring tape:
- Chest / Pit-to-Pit: Measure across front from seam under left armpit to seam under right armpit. Double this number for full chest girth.
- Waist: Measure narrowest point of waist section flat, from edge to edge. Double the measurement.
- Sleeve Length: Measure from center back of neck seam down shoulder to outer sleeve cuff edge.
- Total Length: From highest point of shoulder seam down to bottom edge of hem.