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The issue with this one is that it's 40cm wide. I need to get my tape measure out, but I think 80x80cm could work.

Looking at the other sizes it's basically two sheets - a curve and a flat - configured differently. I assume the reason they're all 40cm wide is to do with the internal brace and you just put more braces in for higher and longer ones.
My workings guess the flat panels on at ~37cm
2x curves=40cm wide therefore, 1x curve=20cm long
20+?+?+20=114
114-40=74/2=37The 6 panel looks to use the same with flat panels and 6*37+40=262. Which is close enough to hopefully confirm this.

... So then the questions are:
- Is ~77cm big enough (2x curves @ 20cm +flat @ ~37cm)?
- Is there's a way to make the brace work in a non-standard configuration?

- Is there another strength/structural factor that means these aren't suitable - e.g. The tree is fucking heavy.
- Will the braces block the rootball from sitting inside? (highly likely 😔)
- Is ~77cm big enough (2x curves @ 20cm +flat @ ~37cm)?
hugo7
Or: https://www.vidaxl.co.uk/e/vidaxl-garden-raised-bed-powder-coated-steel-114x40x36-cm-anthracite/8720286855690.html