What is the difference between BB and B5 in a Butterick pattern.
I matched my measurements, sewed the front and back, tried to put it on for fitting and couldn't get it over my chest. It was a size 12 BB.
I haven't made a dress in years, patterns have changed. It didn't have a P for petite by it, so assumed it would be a true size 12.
To the best of my knowledge, these letters and or numbers do not affect the sizing of your pattern. Personally I have never paid any attention to them.
Can you tell me what Butterick pattern it is and perhaps I could help you better from there. Usually, a pull on style garment would have to be cut on the bias or sewn with stretch knits. Other wise there should be a zipper some where.
Having said that if you could give me more information I could perhaps walk you through it.