Basic cloche pattern

Working with 2 strands of worsted weight held together or 1 strand of bulky
K hook

Round 1: Chain 4, join with sl stitch
Row 2: Ch 2, 8 HDC in ring, join to beginning ch2
Row 3: Ch2, work 2 HDC in each stitch around
Row 4: Ch2, work 2 HDC in 1st stitch, 1 HDC in next stitch around
Row 5: Ch2, work 2 HDC in 1st stitch, 1 HDC in next 2 stitches around
Row 6: Ch2, work 2 HDC in 1st stitch, 1 HDC in next 3 stitches around
Row 7: Ch2, work 2 HDC in 1st stitch, 1 HDC in next 4 stitches around
Row 8: Ch2, work 2 HDC in 1st stitch, 1 HDC in next 5 stitches around
Row 9-15: Work 1 HDC in each stitch for
Row 16: ch2, HDC in next stitch, *HDCtog over next 2 stitches, work 1 HDC in next 5 stitches*, repeat
Row 17: ch2, HDC in next stitch, *HDCtog over next 2 stitches, work 1 HDC in next 4 stitches*, repeat
Row 18: ch2, HDC in each stitch around
Row 19: ch2, 2HDC in each stitch around

So in simple words. Work 6 increase rows, 6 regular rows, 2 decrease rows, 1 regular row & 1 increase row

This is a basic formula for a cloche, so you can change it up with different sitches/colors etc.