My window boxes are 3ft 7in. long by 9 1/2 in. deep. I used a variety of flowers such as vicavine, petunias, geraniums and other assorted colorful annuals from my local nursery. I have been putting together window boxes for 2 years with my dad (my dad says I have a green thumb). I enjoy putting the window boxes together and seeing them grow and change, I like the creativity of being able to plant them the way I would like to.