Materials

Any DK (8-ply/light worsted) weight cotton or cotton mix yarn will create hard-wearing and washable coasters.
I used Sirdar Stories (60% cotton, 40% acrylic), 1 ball each in 836 Invite (white) (A), 810 Spicey (B), 804 Celebrate (C), 817 Aura (D) and 813 Summer (E); 50g/140m/153yd

Each coaster measures approx. 9 x 9cm (31⁄2 x 31⁄2in)