Here is a pattern for really large knitted ball of size 7 inches.
What you need
3.00 mm Needles
2 x 8 ply wool 50 g ball in 2 different colors C1,C2
Large Ball Pattern
Size: approx 7 inch
Cast on 36sts in C1
1st row – Knit
** 2nd row – Sl 1, Knit to last st, turn
3rd and 4th rows- Sl 1, Knit to last 2 sts, turn
5th and 6th rows- Sl 1, Knit to last 3 sts, turn
continue working one st less at end of every row, until 8 sts remain unworked at each end.
Next row- Sl 1, Knit to last 9 sts, turn
Next row- Sl 1, Knit across all sts, picking up horizontal loop and knitting it together with next st at each turning point.
Next row- as previous row .**
Using C2, rep from ** to **
Continue working alternately 18 rows C1 and 18 rows C2 until 8 sections 4 each C1 and C2 in all have been worked.
Cast off in C2 , picking up horizontal loops as before.
Using a flat seam, join seams, leaving an opening for filling. Fill the ball firmly and close opening.