Small cast on 91 (decreasing ÷5=18.2 18+18+18+18+19)
Medium cast on 98 (decreasing ÷5 =19.6 19+19+20+20+20)
Large Cast on 105 ( decreasing at ÷5 =21)
Multiple of 6 sts plus 2.
Rows 1 and 3 —K4, * p3, ; rep from .
Row 2 (k2 tog but do not sl from needle; insert right-hand needle between the sts just knitted together, and knit the first st again; then sl both sts from needle together) twice; p3; rep from .
Row 4— k1, k2 tog and knit 1st st again as before; kl, p3; rep from .
Repeat Rows 1-4.
until desired rim / brim length is achieved.