I bought this Wooden Letter Tray for my A4 prints and it does the job nicely. Postcards, envelopes and circulars are much easier to sort now, and the wood looks good on a desk. One thing to keep in mind: the trays cannot be fixed in place, so stacking takes a bit of care, and the instructions say to stack only up to 3 units. As long as you stack them stably, it works well. Simple, functional storage.