Materials : (For one table mat)
4 mm crochet hook
purple (MC) 32 yard. sport yarn weight
majenta (CA) 25 yard. sport yarn weight
I made 6 table mats using 3 balls (MC) 25 g and 2 balls (CA) 25 g.

Note:
Work going in rounds. Before changing color, I did fasten off and weave the ends. It was easy to me. If you want a larger one, repeat rows 8 - 9 and increase dc sts of the shell.