YiffieMon:Mass

Humanoid characters first calculate their BMI on by rolling 3D6 on Table 2.10a: BMI A characters Mass in Kilograms, can be calculate with the formula:

HiM * HiM * BMI 

Where HiM is the character's Height in Meters and BMI is the character's Body Mass Index

Non humanoid character roll on Table 2.10b: Mass Factors and multiplying by character size.