The size of your scarf 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 scarf to be the size you need or want.
The finished size of this particular scarf measures approximately 30 centimeters x 2 meters which is about 12 x 79 inches. I like a long scarf but you do not have to make your scarf that long. The experience I have had is that the scarf will start to get longer when crocheted that long from the start. The weight of the yarn pulls the length some. It starts to get long like a Dr. Who scarf after you have worn it several times. The best is to make the scarf a bit shorter from the beginning.
Gauge for this particular scarf: 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.
Tips About This Scrapbusting Technique:
The scarf was always crocheted with 3 yarns simultaneously. What looks really great is when always at least one of the yarns a variegated yarn. The changing of the color of the variegated yarn will add more interest to all of the rows.
This scarf 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 scarf will be consistent. That means do not crochet with 3 very thin yarns or 3 much thicker yarns simultaneously. This scarf 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.
This is a color sample of how the rows look. Because you are only changing out a color every few rows, the color change is gradual.
How this scarf was made:
Chain 25 with three yarns simultaneously and single crochet in the second chain from the hook. Single crochet until the end of the row. You have now 24 single crochet stitches.
Crochet a few rows with the three yarns and then change out one of the yarns for a new color. This is a good way to work in those yarns where only a small amount is remaining. Continue in this manner throughout the whole scarf.