10 chains are drawn and the ring is formed.

Row 1:  On the ring is made 19 pcs double crochet with 3 chains.

Row 2: 3 pcs chains is pulled and 19 pcs double crochet are made.
 

Row 3: 3 pcs chains is pulled and total 19 pcs double crochet is knitted in the form 1 pcs double crochet and 1 pcs chain.

Row 4: 7 pcs chains are drawn and and at the second space is knitted.
4 pcs chains are drawn 3 times and placed on the lower chains.
Seven chains are drawn in the middle and completed on the other side.
 

Row 5: With 3 pcs chains are returned and 9 pcs double crochets are maked on 7 chains.

4 chains are drawn on the chains and the row is completed.

 

Row 6: With 3 pcs chains are returned, 9 pcs double crochets on the double crochets and row is completed by knitting 4 pcs chains on the chain.

Row 7: Row are completed by with 3 pcs chains are returned and 9 pcs double crochets to make a chain between them while pulling 4 chains.

In this way, the desired length is knitted until obtained.