I learned about this hive last year from Barnyard Bees in Georgia (great YouTube channel). He has a video with the dimensions if you want to build one. So these are great hives for a few purposes. What I successfully used them for last year was to split a package of bees and to split a hive.
Packages of bees are so expensive!! What I did successfully last year was to split one package of bees into four of these hives! I had to buy three other queens as well but that was so much cheaper then buying 4 packages! All four hives we a little slow to start but took off becoming four amazingly productive and populated hives in my apiary! I figured it was a $250 savings which goes a long way when you are a beekeeper!
Once I graduated these four colonies I then used the skinny mini to split a large hive in my apiary. I put a frame of fresh eggs and plenty of brood with many nurse bees and an empty frame into the skinny mini. I checked it in two days- add a lot of bees because some will migrate back to the original hive if they are in the same bee yard or close by. Within a few days, queen cells appeared so I let nature take its course. In a few weeks I had a new colony of bees with a new laying queen.
If you are interested, I do sell Skinny Minis at Hillside Hives. You can find information here. Also, remember to visit Barnyard Bees on YouTube if you want to build your own!