A top can be wide enough and still too short

Compare chest width and body length together before selecting a tee or hoodie size. Then check the shoulders and sleeves. This shows whether a larger option adds the length you want or mostly adds more width.

Start with a top you already like

Lay a similar garment flat without stretching it. Note chest width from side to side at the agreed underarm level, body length using the chart's stated starting point, and sleeve endpoints. A length measured from the shoulder near the neck will not necessarily match one measured down the centre back.

Keep body measurements separate. A flat 58 cm garment width is not a 58 cm body chest measurement. Doubling flat width gives an approximate garment circumference, but the room you want around your body depends on cut, fabric and preference.

Compare the silhouette, not the letter

Here is a hypothetical comparison in centimetres:

Garment	Flat chest	Body length	What changes
Your reference top	56	70	The shape you already know
Candidate M	59	66	Wider and shorter
Candidate L	61	68	Wider again, still shorter

Moving from M to L adds 2 cm of body length but also 2 cm of flat chest width. If your main goal is a longer hem with the same width, neither option reproduces the reference shape. A different cut may be more useful than another size increase.

Shoulders and sleeves explain the rest

A dropped shoulder can make the sleeve seam sit farther down the arm. A sleeve number measured from that seam may look short beside a conventional shoulder construction even when the cuff reaches a similar point.

Ask where the sleeve measurement begins: shoulder seam, neck edge or centre back. Compare matching methods. For a hoodie worn over another layer, use a reference garment worn the same way; comparing it only with a close-fitting tee hides the extra room you expect.

Make fit comments usable

“Oversized” and “true to size” are starting clues. A useful comment also says which size was bought, what the wearer compared it with and whether the issue was chest, length or sleeves. A QC measurement is most useful when those same endpoints are visible.

Choose T-shirts for neckline and print-placement questions, or hoodies and sweaters for layering and construction choices. If a chart mixes body and garment figures, resolve that with reading size charts before deciding.