<https://club.omlet.co.uk/forum/topic/29467-ikea-planting-bags/#comment-475588>
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"They are quite big, they must be about 40-50cm across and the same high (they are still in the car so can't be sure!) \n  \nthere is a ring of plastic that slots in the top to make the top ridged which is handy \n  \nThey are not waterproof so I am guessing they will let the water drain ok but I will probably pierce a few holes in the bottom anyway \n"
<https://club.omlet.co.uk/forum/topic/29467-ikea-planting-bags/>