It's about 21 yards in 13cm

It's about 22 yards in 13.5cm

It's about 23 yards in 14cm

It's about 24 yards in 14.5cm

It's about 25 yards in 15cm

It's about 26 yards in 15.7cm

It's about 27 yards in 16.5cm

It's about 28 yards in 17cm

It's about 29 yards in 17.5cm

It's about 30 yards in 18.5cm

It's about 31 yards in 18.8cm

It's about 32 yards in 19.5cm

It's about 33 yards in 20cm

It's about 34 yards in 20.7cm

It's about 35 yards in 21.5cm

It's about 36 yards in 22cm