These breastplate spacer strips are pre-punched with approximately 60 holes per strip. Each strip measures approximately 24 inches in length and 3/8 inches wide (holes are 7/16” apart on center). They are designed to make any traditional size of breastplate. This will really save you a lot of time on your next craft project. You can also use the leftover lengths for child’s breastplates or mini-breastplate chokers.