See under box.
The packaging of wine for shipping and transport is mostly done in wooden crates, more rarely in strong cardboard boxes. The usual international quantity for crates is 12 bottles of 0.75 litres. This quantity was chosen because it can be carried comfortably by one person. The wine bottles are packed horizontally in the crate (as opposed to in cartons). If production quantities are given in "crates", this refers almost exclusively to crates...
Serious sources on the internet are rare - and Wine lexicon from wein.plus is one such source. When researching for my articles, I regularly consult the wein.plus encyclopaedia. There I get reliable and detailed information.
Thomas Götz
Weinberater, Weinblogger und Journalist; Schwendi