T-Mobile Prepaid Sim Card Starter Kit - 4G/ LTE Data with Triple Size Standard Micro Nano Unactivated Tmobile Blank Sim (1 Pack Blank Sim)

I ordered this SIM card just for the step-down part of the SIM card. As it says in the description it's got all three sizes.

WillyD is one d@mb person. This SIM is for all three size. It's precut so you can pick one. Go back to school.

I’d like to purchase this, but I can’t because the description says that it is a “Standard Micro Nano SIM card.” That’s like saying it’s a “Small Medium Large shirt” or a “Twin Queen King bed.” Which one is it!?? Infuriating.