Difficulty Level: Advanced Intermediate
 
IMPORTANT:  This pattern requires you to perform math to calculate chest increases/decreases!  An optional Google Spreadsheet is provided that will perform the calculations for you if you wish to not manually calculate the math!
 
Testing Information:  This pattern has been completed by many testers ranging from chest sizes from 29 inches to 55 inches and a chest - waist difference of up to 17 inches. A prototype look book is included for inspiration and yarn estimates.
 
Materials
Sport or DK weight yarn is recommended (cotton blend yarns are recommended for structure); however, you can use any yarn you wish.
IMPORTANT: If you are making the closed/full back version, yarn with stretch is HIGHLY recommended so you can comfortably get it over your shoulders.
0.5 - 1 mm LESS than the recommended hook size on the yarn label, or, a hook size to achieve your desired density.
Darning Needle
Scissors
Measuring Tape
Calculator (Optional)