It's a crocheted Pot Cover. This particular pattern calls for 1 ball of No 23 Shaded Tropics Mercerized 'Knit-Cro-Sheen' Thread. I'm not sure this specific thread is still available, but I'm sure you could substitute others. Although you could certainly create this cover using a solid thread, a multi-color would certainly leave you the element of surprise as to what pattern develops !
Thanks for dropping by,