Our Big Bottle Wine racks are designed for those wine bottles that have a bigger diameter and can not fit into our normal sized wine racks. That means if the bottle has a greater diameter than 3 5/16" these are the wine racks they should go into. But, don't just think that these wine racks are for big bottles. Most normal sized wine bottles will fit in them as well. These racks are not only beautiful but they are super strong because they are made from Fir. The bottle rests are double nailed at each end as well as glued. Virtually no other manufacturer does that. They are designed for a lifetime of use and enjoyment!