In Porcellio scaber, the dry mass of clutches (A) and clutch size (B) increased linearly with female body mass, but the mean dry mass of offspring did not depend on female mass in a consistent way (C). Lines represent fitted regressions A y = -0.13+0.08x (r = 0.83, p<0.001) B y = -0.32+0.74x (r = 0.83, p<0.001) C y = 0.1+0.00006x (r = 0.14, p = 0.15).