Question about Gaining Size

Recently I have been working my butt off in the gym, my strength has went out the roof while running my M1T cycle. Though I regained my size I had lost this summer and toned up and cut bf%. I eat very well and have been for the past month, 6 meals a day quality foods, (Cant believe how much Lean Ground Beef can be 96/4) anyways, my arms stay at about 15 1/2 and my chest stays at about 42' whats the best way to gain size and get over this hump? Just lift 1 time a week for each body part at higher weights and low reps example 5 5 3 1 1? Just some suggestions if you dont mind?

first post your routine. do you do all your compound movements

Monday:
Bench Press 5 sets 5 3 3 1 1 2min rest between
Push Press same as above
Weighted Chinup 5, 3 , 3
Weighted dip 5, 3 ,3

Tuesday:
Deadlift 5 , 3 , 3 , 1 ,1
Squat same as above
Good Mornings 5 , 3, 3
Front Squat 5 , 3 ,3

Thur.
Dumbbell Incline (One Arm) 4 sets 8-10 1min rest between
Dumbell Lyingone-arm row same as above
Barbell on-arm bicep curl same
Dumbell upright row same
Cable row with Scapula retraction same

Friday
Bulgarian split squat(weight held to chest) 4 sets 8-10 reps
Barbell Suitcase Deadlift same
Barbell Hack Squat same
Lying Leg Curls with knees together same

I actually just started this routine, any comments?