The individual bottle wine rack is designed for the 750ml Bordeaux bottle size. We suggest that you have at least one other bin type wine rack to hold a larger format (750ml) bottle, perhaps a Half-Bin, Champagne/Magnum or a Diamond(FO5A).
The opening for the bottles is as follows:
The row just below each cross bar is 3 1/2"w x 3"h, all other rows are 3 1/2"w x 3 1/4"h.