I have had awesome size gains with fullbody routines. I like using three diff workouts with three diff rep ranges. Heres an example
Monday-big lifts!
Squat 4x8
Bench 4x8
OHP 4x8
Row 4x8
Wednesday-power
Deadlift 4x5
Floor Press(close grip) 5x5
Weighted pullups 5x5
Upright Row 5x5
Friday-high rep
20rep Squat
Dips 3x12
Cable row 3x12
Push press 3x12
Facepull 3x12
BB bicep curl 3x12
Rope pulldowns 3x12
Google the 20 rep squat workout. That's what I used on Friday. Keep the working weights the same for each set and make sure you add 5 to 10 pounds everyweek. I got huge gains on this program but would not recommend more than 8 weeks of it.