Anycubic i3 mega Easy enclosure.

2 6mm x 455mm rods
1 6mm x 388mm rods
6 8x3mm magnets (I use 4 more to close the enclosure)

I´ve used 1 big trash bag and duct tape to make the enclosure (note I have the the front separete, thats because I dont have transparent plastic yet) but you can use other materials, isothermal bags from the supermarket would be a good option.

Adding duct tape in all the edges make the enclosure more "rigid".

My meassures are just for reference, you can make it longer by increasing the lenght o