Recommended yarn: pure cotton in 8ply (yarn used here Bendigo Woollen Mills Cotton in denim and snow.
Hook Size: 4mm
Pattern: in UK/AUS standard terminology
Row 1: chain 41
Row 2: single crochet into second chain from end, single crochet to end (40)
Row 3*: ch 2, treble to end (40)
Row 4*: ch 1, single crochet to end (40)
Row 5 - 32: repeat Rows 3 & 4 until block is square (total rows depend on tension).
Work around entire project in single crochet to finish edges evenly and provide the base for the picot edge. Each space/row should be a single crochet. Number of single edge stitches will vary dependant on number of rows completed.
Fulsome Picot: this is loosely a picot edging, start new colour yarn, slip stitch into any point on washcloth side, working pattern as follows: *slip stitch, chain 1, treble into same stitch, slip stitch into next stitch, slip stitch into next stitch*, repeat around all edges.
When you reach a corner, work the picot around evenly in same pattern.
To add a loop to hang cloth: chain 20 from a corner stitch, secure back into the same stitch, work back around the chain (using the chain as a central cord) in single crochet (loosely 30 single crochets - stitches should be close and form a sturdy covering of the chain loop). Slip stitch back into the stitch where you started loop, and continue picot edge as described above.
Work any loose yarn threads back into the body of the wash cloth with a large darning needle.
Any corrections or improvements most welcome :)