If you are only altering size and keeping all else the same (i.e. gauge and design) the next step is simple. Draw a schematic and plug in the numbers for the size selected. You can find the size ranges for baby sweaters here in a previous post of mine. For now, I’ll pull up the schematic for a 3 month old.
On graph paper, draw the back, one front, and sleeve form from the original pattern. Now let’s figure out and put in the numbers.
The average total chest circumference for a 3 month old without clothing is 16-17″. The circumference of garments made to fit this size chest is 18.5 -21.25″.
The ease varies from 1.5 to 4.25 inches. I usually start with a 17″ chest and 3″ of ease. Or put another way, I want the sweater to be 3″ larger than the 17″ chest size before seaming. Remember we lose a 1/2 inch each side once we sew up the seams. That means the finished circumference will be 2″ larger than the chest size. It may sound like a lot but it is not. A sweater with 2″ of ease is considered to be close fitting.
The math: 17 + 3 = 20″ total circumference. This falls in the middle of the garment range for circumference. Divide the total circumference of 20″ in half to come up with the measurements for front and back. In this case 20 divided by 2 = 10″.
The back width will be knit to 10″. Enter this number on your graph below the line that represent the bottom of the sweater Back. Now, how many stitches to cast on? Our gauge was 3 stitches per inch. Multiply back width by gauge stitches. 10 x 3 = 30. Cast on 30 stitches.
Since this is a cardigan, we need to divide the Front Width measurement in half to find the width of each front. 10 divided by 2 = 5″. Each front will be 5 inches in width. How many stitches to cast on? Multiply width by stitches per inch. In this case we cast on 15 sts for each front piece.
The length range is 9.5 – 11″. Since the our circumference measurement falls in the middle between the smallest acceptable size and the largest acceptable size, let the length measurement do the same at 10″. Our row gauge was 7 rows per inch. A 10″ length multiplied by 7 rows per inch = 70 rows.
So now you should have filled in the information for length and width of the BACK and two FRONTS of the sweater. On Friday I’ll show you how to figure in a neckline when the original lacks one and we’ll complete the sleeve calculations.
The latest news here is it snowed. Yarn Rascal saw and felt snow for the first time in his life. He went nuts! He thought it was great. He ran and ran and burrowed. He likes to go under the snow. How strange. But he wouldn’t be Yarn Rascal without strange behavior.