The size of your afghan should be your personal preference and there are no set rules how wide or how long you should make it. That means you can adjust your the width and length of the afghan to be the size you need or want.
Gauge for this particular afghan: 8 stiches and 8 rows = approximately 10 centimeters or 4 inches (this will vary a little throughout the whole crochet process as you will be changing the yarns regularily. But in the long run, it all looks even.
Tips About This Scrapbusting Technique:
The afghan was always crocheted with 3 yarns simultaneously. What looks really great is when at least one of the yarns is a variegated yarn. The changing of the color of the variegated yarn will add more interest to all of the rows.
This afghan was crocheted with always at least 1 variegated yarn plus 2 solid colors or 1 solid color plus 2 variegated yarn colors.
Try to keep the yarn weights even so that the width and gauge of the afghan will be consistent. That means do not crochet with 3 very thin yarns or 3 much thicker yarns simultaneously. This afghan was often crocheted with 2 thinner yarns plus 1 thicker yarn, 3 middle weight yarns or 1 thicker yarn plus 1 middle weight yarn plus 1 thinner yarn.
How this afghan was made:
Chain approximately 150 with three yarns simultaneously and double crochet in the second chain from the hook. Double crochet until the end of the row. You have now 149 double crochet stitches. Turn, chain 3 continue in the same manner as the first row until the end of the row. Continue like this throughout the whole afghan.
Crochet a few rows with the three yarns and then change out one of the yarns for a new color or wait until one of the yarns runs out. This is a good way to work in those yarns where only a small amount is remaining. Continue in this manner throughout the whole afghan. When finished, finish the last row with a double crochet row, cut the yarn and then pull it through the loop on the needle to knot it.
Because you changed the yarns out several times, there are now quite a few yarn ends that need to be sewn into the afghan to secure them so that the afghan will not come apart. That step is not so fun, but necessary.
Add fringe if you like. Fringe for this afghan was crocheted and the instructions are below. Or you can use the typrical fringe technique, as well.