What classification does the LED have?

By shape: Colloidal(3mm,4mm,5mm,8mm,10mm,12mm), Square, Oval, Tombstone shaped, Piranha and so on.
By size (Length*Width): 3528, 3014, 5050, 2835, 3020, 3535, 5730, 5630 and so on. For example: 3528 LED means the length of the LED is 3.5mm, the width is 2.8mm.