I find the size of this bag very suitable. It is big enough to grow the plants bigger and at the same time it is possible to move around after filling soil (little bit heavy but possible). The bag is strong enough I think it will last for a few years. It is supposed to last for 5 years, but I have used them for only a few months. Hopefully it will be durable as advertised. I am using these grow bags currently and I am happy with them.