I am making Evie's halloween costume
So I am between size 1/2 and size 1 (size chart here http://mccallpattern.mccall.com/toddlers--pages-584.php )
Does anyone know how the 1/2 measures up to regular clothing sizes (12M?) Or is size 1 12M?
The approximate hight thing is confusing me. At her last dr visit she was 29.5. But she is a thin girl and is 18.5 chest and 19 waist .
Would hate to make something that ends up being huge or too small.
Re: sewing girls
Given the measurements you listed, I would make the size 1 pattern. It probably won't be way too huge, maybe a little loose. It's definitely better to make the larger pattern and take in as necessary, but if you plan to layer clothing underneath I don't think 1 inch additional fabric in circumference would be a huge issue. The costume's look isn't dependent on being form fitting, so I think you'll be fine.
You can always call McCall's directly if you're still unsure-- most of the pattern makers are really great about answering questions.
Good luck and post pics when you're done!