On the size of the tables at Wedding Breakfasts
The usual width of a table or tables for a wedding breakfast is from 3 feet to 3 feet 6 inches; the manner of placing the tables depends upon the size of the room and the number of guests expected.
A sitting-down breakfast demands more space than does a standing-up one; for the former 18 inches would be allowed for each guest, for the later [sic] 12 inches could be made to suffice; and small round tables are more convenient for sitting-down breakfasts than are long tables.
~ Party-Giving on Every Scale: Or the cost of entertainments with the fashionable modes of arrangement. (1880, reprinted 2007) Frederick Warne and Co., London.