Daydreamer tees are graded by fit family — Shrunken (Vintage, Headliner), Classic (Reverse GF, Solo, Tour), Slouchy (Boyfriend, Weekend), Oversized (Merch). Each product's details name its fit; the model wears a S. Garment measurements in inches, taken with the piece laid flat. Measure a favourite piece you own the same way and compare. Chest is the flat width across the front.
Vintage tee — shrunken
| Size | Chest width | Length |
| XS | 15 | 19 |
| S | 16 | 19.75 |
| M | 17 | 20.5 |
| L | 18 | 21.25 |
| XL | 19 | 22 |
Reverse GF / Solo tee — classic
| Size | Chest width | Length |
| XS | 18 | 21.5 |
| S | 19 | 22 |
| M | 20 | 22.5 |
| L | 21 | 23 |
| XL | 22 | 23.5 |
Boyfriend tee — slouchy
| Size | Chest width | Length |
| XS | 18 | 24.5 |
| S | 19 | 25 |
| M | 20 | 25.5 |
| L | 21 | 26 |
| XL | 22 | 26.5 |
Weekend tee — slouchy
| Size | Chest width | Length |
| XS | 18.75 | 25.5 |
| S | 19.75 | 26 |
| M | 20.75 | 26.5 |
| L | 21.75 | 27 |
| XL | 22.75 | 27.5 |
Merch tee — oversized
| Size | Chest width | Length |
| XS | 22.25 | 26.25 |
| S | 23.25 | 27 |
| M | 24.25 | 27.75 |
| L | 25.25 | 28.5 |
| XL | 26.25 | 29.25 |
Oversized crew & hoodie
| Size | Chest width | Length |
| S/M | 27 | 25 |
| L/XL | 29.5 | 26.25 |