A method includes receiving a routing grid that includes nets each net having a bounding box maximum dimension, a net length and a number of pins associated with each of the nets, generating a list of the nets, the list of the nets sorted in order by the bounding box maximum dimension, the net length, and the number of pins associated with each of the nets, calculating a sum of the number of pins, calculating a sum of the length of the nets, identifying a net for which a difference of the sum of the number of pins and the sum of the length of the nets is a maximum value, determining the bounding box maximum of the identified net, calculating a tile size as a function of the bounding box maximum, performing a global routing process using the calculated tile size to generate a global routing design.