量腰围。 让穿着者把松紧带套在腰上。

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
Have the tutu-wearer-to-be stand still, with their back straight.  With a measuring tape, measure from their waist to the part of their leg where the tutu skirt should end. Most tutus fall between 11 in. (28 cm) and 23 in. (58 cm) from the waist. This will ensure it is tight enough around the waist. Adjust it, if necessary.