Are you looking at the full length Radium Girls? It's about a 2 hour run time, if memory serves: https://www.dramaticpublishing.com/radium-girls
We're doing These Shining Lives next year - same basic story, told in a different way. The cast is significantly smaller though.
Recommended Reading for Girls by Ellen Struvehttps://www.ellenstruve.com/play-descriptionsShe wrote this play in direct response to the need for more roles for women.
And it offers interesting feminist critiques of traditional heroines in girls' books.