Mine is a 1M wide x 5M long x 2M deep pit in my garage fitted with 2 off 5M x 2M pieces of reo mesh that have spaces just the size of a champagne bottle diameter. The reo is spaced 3/4 of a bottle height and it holds 600 bottles. The pit/cellar is covered with 50mm thick timber slats. Currently there are only about 500 bottles of shiraz but all have a cellaring potential of 7-10 years and most are from McLaren Vale in SA.