SS Toe in Gauge
If you have tile or wood floors, great. If not, just run a piece of blue tape in front of the speakers parallel with the front wall. Put your wood on the outside corner of the speaker and mark your line on the floor to the wood a 0. Then just mark ½” increments up the wood. Those will be your inside corner toe in measurements. Not only will your speakers be equal distances from the wall (if you line is). The toe in will be perfect.