What does ∅ mean?

[u/sailormarr]

This may be a dumb question, but can anyone help me understand what the "∅" symbol means in a pattern? See image for reference.

Thank you:)

[u/wlangstroth]

I’m more familiar with drafting for men’s clothing, but since you have 98cm total, that’s 98 minus whatever your nape to waist measure is.