Is the ordinary led bulb a big screw or a small screw?

Ordinary led bulbs are mostly E27 screws. Small E 14 small head screws are rarely used.

The screw diameter of E27 is about 27 mm, and that of E 14 is about14 mm. ..

E 14 small head screws are sometimes used for bulb lighting of refrigerators or small equipment.

E27, also known as big head screw, is the most common one in ordinary families! There are also some lamps and lanterns that are E 14, called small head screws! These two are the most common bulb connectors in China, and the other is E40' s bigger screw, which is used for more powerful bulbs.