A 3.0mm hook is between a US C2 and D3

Pattern is written in UK crochet terms. If you are unfamiliar, please take a moment to search for the differences between US and UK terms. You can also check here (scroll down a bit) - https://knitrowan.com/en/terminology

Finished measurements:
Chest circumference: 35.5( 39.25, 43.25, 47.25, 51.25, 55, 59, 63, 67)“ 90( 100m 110m 120m 130m 140m 150m 160m 170) cm
Finished length: 20.75( 1.75, 22.5, 23.25, 24, 24.75, 25.25, 26, 26.5)” 53( 55, 57, 59, 61, 63, 64, 66, 67) cm

Yarn used:
Mode at Rowan Cotton DK
Shade 011 Macaroon - 6(7, 8, 9, 10, 11, 12, 13, 14) balls

Note: Pattern MIP49 contains the English version only.
Pattern MIPT49 contains translations into French, German, Italian and Spanish.
Translations in Danish and Swedish are available through digital download only.