I had been walking around with a 10"  7" storage box for my freshwater shore fishing.  I'm not a hardcore fisherman so I only have a few lures etc.
 Most were gifted (probably because they didn't work...) but I rotate through them and get lucky occasionally.  Truth be told hooks and bobbers are most likely all I need as live shiners seem to be the only thing that seems to always work.

Anyway I didn't feel like always putting  down and picking up the storage box when I walked.  So I wanted something small and convenient I could easily carry.  A tackle box or even small tackle bag like the ones I've seen at W Mart even seemed to be too bulky for my purpose.

Came across this and it appeared to be perfect.  I like that it's just the right size (small) and stays close to my body (out of the way)  it's very easy to carry.

 I read many of the questions about it trying to figure which storage box would fit.  There did not seem to be a consensus as the bags dimensions do not match up with standard sizes of storage boxes.  Someone suggested 3400 and 3500 hundred boxes fit.  I received the bag and went a local sporting goods store.

A perfect fit  is two plano 3449-22 in the main compartment and one 3449-22 in the front compartment ( see pictures).  These are double sided storage boxes. There were some small plano boxes that almost fit in small compartment but the zipper didn't close.  I found an altoids container fits, you can probably actually get two in there.  This gives quite a lot of storage for such a small bag.  The three 3449-22s offer 30 spaces for your average size lures or more if you divide them.  There is even a little extra space in the main compartment after the boxes are in for a flat bag of worms.

Overall it's perfect for me.  Quality seems okay but you never know until you put it to some use.  I'll update if it has any issues.