(a) The size distributions of the H ii regions in the original (solid line) and group (dashed line) samples in comparison with those in Scoville et al. (2001) (dot-dashed line). Thick solid lines represent power-law fits for 1.5 < log D < 2.1. (b) The size distributions for the grouped H ii regions (solid line) and the H ii regions in the group sample (dashed line) in comparison with those in Thilker et al. (2000) (dotted line) and in Gutierrez et al. (2011) (dot-dashed line). Thick solid lines represent power-law fits for 1.7 < log D < 2.4.