Lined rattan baskets are available in a quite a few shapes. Please do make a hole in the liner prior to planting for drainage. See below for sizes and shapes.

Round
7.25" dia x 5.5" tall - $12.99
9.75" dia x 7.25" tall - $19.99
12.5" dia x 9" tall - $24.99

Taller Square
9 x 9 x 7.25" tall - $21.99
11 x 11 x 9.5" tall - $29.99
13.5 x 14 x 11.5" tall - $39.99

Rectangle
13.5 x 7.25 x 5" tall - $29.99

Short Square
9.5 x 9 x 5" tall - $23.99