New knitter with question about pattern

[emmasmommy]

I just taught myself to knit about a month ago. I found this sweater pattern that I would like to make for both my girls and I have a question about it (I picked this one because of the "very easy" in the title!)

http://margarethubertoriginals.com/CHILDBLUE.html

The biggest size is 6, but I think I would like to do a size 8 for dd1 since she is closer to a 6x-7 in most of her clothes. How can I scale up the pattern to make a size 8 - or can I? I also plan to make one in size 4 for dd 2, so I would like to make them matching sweaters, but maybe in different colours.

[blazfglori]

Use larger needles than are called for in the pattern, or thicker yarn.

[utopia760]

if you notice the stitches for the sizes are only 2 more each size add 2 more so co 40 stitches knit every row to 8 inches (since each size goes up and inch) see what im doing- just pay attention to the diffrence between the sizes and ass that to what is says to do for size six!

[flapjack]

Knit the size 4 first and see how it fits. Take your elder daughters measurements- particularly arm length and length of back, as well as chest- and then check those with utopia's suggestion.