Hi,

more details on brand and model would have been better

If i've got right your model/brand (Anycubic Delta kossel linear), it should be 90mm, printable area of 180mm (200mm glass), 300mm height.

By the way in a delta printer, it's always the half of your printable (base) area, not just the half of the glass or plate.

I hope it helps,

Nico