This pattern is easily customizable, as pdf pattern only shows which color to use for each row. For reference, I cast on 210 stitches on 4.5 mm needles to get a blanket 3.9’ wide and 3.5’ long using garter stitch. I used 7 skeins of color 1, 4 skeins of color 2, 5 skeins of color 3, 3 skeins of color 4, and 1 skein of color 5.