CREATE TABLE table_name_87 (size__mw_ VARCHAR(255), county VARCHAR(255), turbines VARCHAR(255), turbine_vendor VARCHAR(255))
What is the size of the windfarm in wexford that has more than 19 turbines and a vendor of Enercon?
    
SQL: SELECT size__mw_ FROM table_name_87 WHERE turbines > 19 AND turbine_vendor = "enercon" AND county = "wexford"