A standard trading unit as defined in UMIR (Universal Market Integrity Rules). The board lot size of a security on Toronto Stock Exchange or TSX Venture Exchange depends on the trading price of the security, as follows: Trading price per unit is less than $0.10 – board lot size is 1,000 units Trading price per unit is $0.10 to $0.99 – board lot size is 500 units Trading price per unit is $1.00 or more – board lot size is 100 units