how big is a mucus plug

A mucus plug is typically about 4 centimeters long and contains roughly two teaspoons of mucus. It covers the cervix during pregnancy to protect the uterus from bacteria. The mucus plug can measure around 1 to 2 tablespoons in volume, which is about 10 grams, and has a thick, sticky consistency. It can come out all at once or in smaller pieces near the end of pregnancy.