What are the vehicle size and weight requirements for Class A B and C driver licenses non-CLD?

The same as they are for their CDL equivalents -

• Class A: Any combination with a gross vehicle weight rating of over 26,000 lbs, provided the vehicle in tow is rated at greater than 10,000 lbs.
• Class B: Single vehicles or combination with a gross vehicle weight rating of over 26,000 lbs, and in which a vehicle in tow may not exceed 10,000 lbs. rating.
• Class C: Single vehicles and combinations under 26,000 lbs. gross vehicle weight rating