What is a healthy range for hdl?

Above 50. Above 50 and a quarter of the total or more; the higher the better.
Large HDL >10 μmol/L. The usual answer given is for cholesterol associated with apo-a1 protein, the chief organizing protein of HDL particles, called hdl-c & mg/dl. But this is not the correct or most important. Hdl is a complex particle which carries fat molecules, not just cholesterol. Hdl particle concentrations are measured in µmol/l. Large HDL particles are the protective ones & should be ?10 µmol/l for low risk.