This pattern is available in both UK and US terms.
This pattern uses short row shaping. If you are unfamiliar with that technique, you can find a tutorial here:
With set-in sleeves and a sweet ripple pattern back and front, this is the sweetest little cardigan for your little one.
Ripples Craft BFL 4ply, 100% Blue Faced Leicester, 400m, Stormy Seas
7 (7, 8, 8, 9, 9, 10, 11, 12) Buttons
Work 18st and 16 rows in alternating double and treble crochet to measure 10x10cm/ 4x4in using 4mm hook, or size required to obtain tension.
Pattern checkout is via Ravelry.