For this basket I used 1.5 litre milk cartons and it's a 4x3 base size. The technique is reasonably easy to get started with, although joining up the corners and finishing the round is a bit trickier. I reckon total construction time for a first time go was about 4 hours.
We're going to teach our grade two students how to make smaller versions of these for a fun spring project next month, complete with wrapped string eggs to place inside. We're a bit mad for it, I'm sure - if only for the sheer volume of cartons we're asking families to bring in, which then need to be cut down to into stripes. Eek! I'm guessing I'll be mad as a hatter by the end of it all. Wish us luck!