You require two colors of yarn, dark and light.

Terminology: all crochet terms used are U.S.

Technique: Overlay mosaic crochet and Interlocking filet crochet in the round and row by row bottom up.

Below are two yardage options for sports and fingering yarn

Yarn: for example, Scheepjes Stone Washed

Gauge: 10 stitches in 5cm (2”) by 5 rows in 5cm (2”) in dc stitch pattern.

Hook 3.25 – 3.5 mm. Hook size needed to match the gauge.

Yardage approx
#1: 95 m of dark yarn, 72 m of light yarn. (104 yds and 79 yds)
#2: 83 m of dark yarn, 82 m of light yarn. (90 yds and 90 yds)
#3: 80 m of dark yarn, 87 m of light yarn. (87 yds and 95 yds)
#4: 82 m of dark yarn, 81 m of light yarn. (89 yds and 88 yds)
Size: the side of the square is 25 cm (51 x 51 stitches, slightly less than 10 inches).

Yarn: for example, Scheepjes Whirl, Whirlette

Gauge: 13 stitches in 5cm (2”) by 7 rows in 5cm (2”) in dc stitch pattern.

Hook 2.5 mm. Hook size needed to match the gauge.

Yardage approx
#1: 63 m of dark yarn, 47 m of light yarn. (69 yds and 51 yds)
#2: 54 m of dark yarn, 54 m of light yarn. (59 yds and 59 yds)
#3: 52 m of dark yarn, 58 m of light yarn. (57 yds and 63 yds)
#4: 54 m of dark yarn, 53 m of light yarn. (59 yds and 58 yds)
Size: the side of the square is 19.5 cm (51 x 51 stitches, 7.5 inches).