Size Chart

Trendline tees use AS Colour fit blocks, so sizing stays consistent across drops. The key is matching your preferred fit style to your measurements.

Fit types and how they should sit

Slim fit

• Sits closer to the chest, shoulders, and sleeves.
• Cleaner silhouette with less fabric through the body.
• Choose this if you prefer a more tailored look.

Regular fit

• Straight, everyday fit with room to move.
• Sleeves sit naturally without feeling tight or oversized.
• Best starting point if you want true-to-size wear.

Oversized / boxy fit

• Intentionally wider body and roomier sleeves.
• More relaxed drape and a looser visual profile.
• Designed to look bigger—do not size up automatically unless you want an extra-exaggerated fit.

Measurement guide (most accurate method)

1. Take your best-fitting tee and lay it flat.
2. Measure chest width (pit-to-pit).
3. Measure body length (high shoulder point to hem).
4. Optional: measure shoulder width for oversized or boxy fits.
5. Compare your numbers to the size guide on the exact product page.

Flat-lay garment measurements are more reliable than guessing from S/M/L labels alone.

Practical sizing tips

• Between sizes?
  • Choose the smaller size for a closer fit.
  • Choose the larger size for a more relaxed fit.
• Prefer a slim look in a regular-fit tee? Size down only if your chest measurement still fits the chart.
• Prefer oversized styles? Start with your usual size first; many oversized cuts are already built with extra width.
• Buying your first style from us? Compare one tee you already love against our chart before ordering.
• Allow small tolerance: minor manufacturing variation is normal.

Source note: Guidance adapted from AS Colour public size-guide resources and product pages.