The interior is much less wide than it sounds in the description--much of the width is taken up with the lip. Color is also more drab than it appears in the description. I would like to return this item and find something better, but they want to charge me to return it. The two stars are because it does seem engineered well, and probably won't blow off the railing--so for someone who wants to plant shallow-rooted plants, it might work. But NOT for my kitchen herb garden. Unhappy buyer.