This is a free pattern…for trying out double knitting techniques, using left over yarn or just because you want some coasters.
Finished size is 3 7/8″ x 3 7/8″ (9.8 cm x 9.8 cm)
Here’s the pattern in a pdf: http://www.sg-creations.org/mushroom-coaster-free-pattern/
The pattern has charts for knitting both the front and back. It also has 'coloring' charts for you to try out color combinations to test if you have enough contrast or like the color combo.