This Cardigan is worked in one piece starting from the top and working down, then joining to make the sleeves. It is made using the lemon peel stitch.

The size chart is in the photos.

Materials
dk / weight 3 yarn I used Paintbox Yarns Simply DK Shade Washed Teal 100% acrylic (276 metres per 100g)
3.5 & 4 mm crochet hooks
3-6x 15-20mm buttons

Written in English US terms with abbreviations for UK

The PDF is 28 pages, with each size written separately and has plenty of photos.