[krn001]

I have used this as a guide:
*1 Regular Card = 20 Point - Use All Standard or Regular Card Holders
*3 Regular Cards = 55 Point - Use 55 Point Holders (Also called Action Packed Size or Thick)
*4-5 Regular Cards = 70-75 Point - Use 75 Point Holders or Extra Thick Holders
*6-8 Regular Cards = 120-130 Point - Use 130 Point Holders (Commonly called Memorabilia Size or Real Thick or 3.5 mm)
*9-12 Regular Cards = 180 Point - Use 180 Point Holders (Also called Super Thick)