You require two colors of yarn, C1 (a background color) and C2 (a pattern color).

Terminology: all crochet terms used are U.S.

Technique: Overlay mosaic crochet in the round or row by row.
Interlocking filet crochet in the round.

Below are two yardage options for sports and fingering yarn (for solid version)
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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
Yardage approx.
#1: 90 m of C1 yarn, 80 m of C2 yarn. (98.5 yds and 87.5 yds)
#2: 95 m of C1 yarn, 80 m of C2 yarn. (103.9 yds and 87.5 yds)
#3: 100 m of C1 yarn, 75 m of C2 yarn. (109.4 yds and 82 yds)
#4: 100 m of C1 yarn, 80 m of C2 yarn. (109.4 yds and 87.5 yds)
Size: the side of the square is 25 cm (51 stitches, slightly less than 10 inches)
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Yarn: for example, Scheepjes Whirl, Whirlette
Gauge: 14 stitches in 5cm (2”) by 7 rows in 5cm (2”) in dc stitch pattern.
Hook 2.5 – 3 mm
Yardage approx.
#1: 60 m of С1 yarn, 55 m of С2 yarn. (65.6 yds and 60.1 yds)
#2: 62 m of C1 yarn, 55 m of C2 yarn. (67.8 yds and 60.1 yds)
#3: 68 m of C1 yarn, 50 m of C2 yarn. (74.4 yds and 54.7 yds)
#4: 65 m of C1 yarn, 50 m of C2 yarn. (71.1 yds and 54.7 yds)
Size: the side of the square is 18 cm (51 stitches, 7½ inches).