While wandering the aisles of one of the big box stores today, I came across Sterilite Adjustable Ornament Storage boxes. If I hadn't recently purchased Art Bin's strip storage boxes, I'd use the Sterilite ones for sure for my 2.5" strips! They have fixed dividers that are 3" wide; I'd leave the dividers meant for inserting as needed off.
http://www.target.com/p/sterilite-ad...nament+storage (I was actually at WM, but dont see a pic on their website. They were about $9 each)
The Art Bin ones I have:
http://www.amazon.com/gp/product/B00...=sr_1_1&sr=8-1
On sale now at Joann's: Sterilite's Stack and Carry in the 4-layer small size for thread and scraps. (Sorry, couldn't find a picture on line.) It is deeper than the Snap Ware layered box I previously used. Aurifil threads, which is what I use most and buy in bulk when on sale, doesn't fit upright in the Snap Ware ones. Snap Ware also has ornament storage containers that you can leave the cross pieces out of for strip storage.