Case for smartphone in crochet

Measurements:
5 inch. Mobile phones.

Materials:
15 grams of fine summer cashmilon, 1 button, steel crochet needle No 00.

Stitches:
Chain Stitch, Slip Stitch, Double Crochet, Crab Stitch

Realization:

45 ch and close round with 1 s.t. stung on 1° ch making a ring.

1°r: inside ring 3 ch and 2 d.c. stung on next 2 ch *skip 2 ch, 1 d.c. stung on next ch, 1 ch, 1 d.c. stung on 1° ch previously skipped, 3 d.c. stung on next 3 ch* rep. from * to * across all the r. and finish it with 1 s.t. stung on 3° ch counting from the bottom.

2°r: 2 s.t. stung on next 2 d.c. and 4 ch. 1 d.c. stung on 1° ch *1 d.c. stung on next d.c., 1 d.c. stung on next ch, 1 d.c. stung on next d.c. Skip 2 d.c, 1 d.c. stung on next d.c., 1 ch, 1 d.c. stung on 1° d.c. previously skipped* rep. from * to * across all the r. and finish it with 1 d.c. stung on 3° ch counting from the bottom.

3°r: 3 ch and 1 d.c. stung on next ch. 1 d.c. stung on next d.c. *skip 2 d.c., 1 d.c. stung on next d.c., 1 ch, 1 d.c. stung on 1° d.c. previously skipped, 3 d.c. stung on next d.c., ch and d.c. respectively* rep. from * to * across all the r. and fiish it with 1 s.t. stung on 3° ch counting from the bottom.

Rep. 2° and 3°r.

Ending:

Work around 1 r. with Crab Stitch.

work from back 15 ch. and then 20 s.c. stung inside this arc of ch.

References:
No.: number
r.: row
rep.: repeat
ch.: chain stitch
s.t.: slip stitch
s.c.: simple crochet
d.c: double crochet