Mass is more precise than size, as it includes density. The greater the mass, the greater the attraction towards center — aka gravity.
If by irregularity you mean even slight aberrations from perfect sphericity, 😎 I believe in this imperfect universe (is it though?), an absolutely perfect sphere will be exceedingly rare, as it would likely require zero rotation and no tugging from neighbors. Our sun is actually pretty spherical, due to its relatively slow rotation, but it does still rotate, and therefore has a slight beer gut.
I love exceptions to make a theory work. at what mass can objects no longer be irregular or is it size that matters?
Mass is more precise than size, as it includes density. The greater the mass, the greater the attraction towards center — aka gravity.
If by irregularity you mean even slight aberrations from perfect sphericity, 😎 I believe in this imperfect universe (is it though?), an absolutely perfect sphere will be exceedingly rare, as it would likely require zero rotation and no tugging from neighbors. Our sun is actually pretty spherical, due to its relatively slow rotation, but it does still rotate, and therefore has a slight beer gut.