if it is QFP144 of TI, the foot distance is .65 and the maximum foot width is .38; Here is the mm unit used.

if it is TQFP144, the foot distance is .5; The maximum foot width is .27; This is in mm units.

if you have the package making software LP Wizard, there are standard values of this package; If it is not welded by machine, it can be considered to lengthen the pad appropriately.