Ok, so I'm going to be totally honest and say maths scares me... particularly if after hours of knitting I find I got this all wrong... and I might yet!
I have a 41" bust (UK14 'ish') and want a neckline of about 10" in width... I also want to work in the round, starting at the top and working down. This I am hoping will give me the opportunity to try on as I go, whilst bearing in mind the gauge change after blocking as discussed last time.
So above you can see my maths work... for a 42" bust (a spare inch of negative easy so I can wear a t-shirt under the top and feel comfortable), with my gauge, at washed stage I estimate that ideally I need 231 stitches (sts) in the round. As I want to knit a 2x2 rib at the hem (which works in 4 st multiples across the width) I rounded down to 228 sts... I figure that a 3 st difference on the round won't impact my 1 inch negative ease by too much. This also gives me a nice 114 sts per half body, which won't feel like it's taking the world to knit in Double Knit! I'm also taking in to account here that this might stretch on the body during wear.
I have also worked out my cast on at the neckline to be 55cm, or 110 in the round. I'm going to start with a 2x2 rib neckline and see how this knits up... will the rib draw my neckline in too much? Let's see.
At the moment I haven't calculated lengths (except for ribbing at the neckline of 1 inch), because I'm hoping I can work this out as I try it on and see how the knit works... it will also be an excuse to check gauge as I knit... this will be crucial.
I will let you know how I get on.
Have a wonderful day... Sara x