How many can be stacked together ?
141663
Basically no limit, but they may start to bind up if you REALLY weigh them down, I suppose.
141664
I have stacked three shelves. I cannot tell if a 4th shelf would fir. Four would be very tall and if you are sitting it would be inconvenient.
122728
Each set of 2 can be nested -- one rack is slightly larger than the other so they can be stacked. You cannot nest more than 2 racks together. All other components can be nested in multiples for storage.
1482561
There are grooves in the containers so that they do stack. Just keep in mind that the containers will be fairly heavy once the 12 individual boxes are filled with photos. I don't know how much weight you would want to put on the larger box. I think stacking one on top of the other would be OK, more than that might be a problem.
975647
Yes, they will nest together for stability. I have not attempted to stack them, so I don't know if that would be advisable.
2149833
You cannot stack them. The bottom has only a very slight taper so not near enough to stack them.
1456798
Yes, they are stackable. I stack mine 2 at a time, but more can be stacked without any issues.
454216
Depends on size either two per section if large or three per section. But you can stack them instead of total side by side
22850
Yes, you can stack them. I have three of them stacked. You can also buy a four shelf set on Amazon. I would have done that, but, I already had two.
1738897
They do stack, though don't go higher than 4. Each one has little bumps for feet. You'll live them;)
69370
They can indeed stack, I have them stacked 4 high in my cabinet at this very moment. Nesting is a bit of a strong term though since they don't really sit down one in the other very much. Not like plastic storage ware would. Still, definitely stackable.
1705326
If you only have two, you could probably stack them. For anymore than that, you are going to have a height consideration which means more storage space.
1351087
they can be stacked, but they don't lock into place and I don't think the intent is to be stackable
133691
Yes, they are. But we only bought two, so do not know how many you could stack.
742046
They are not stackable. One could probably do it, but they would be unstable and fall. They are fragile and would break.
529731
I would think you could stack as many as you want, provided you have a flat base. I only have two sucked, but each one has the same alignment tabs at each foot.
1503429
I don't think these are really made to stack. You might could but I don't know how good it would work. I only have one so I don't have any way to test that.
429864
I wouldn't stack them inside each other. They have become stuck and broke when I've done so in the past.