Hey man, I see youre training 5 days a week so you have the ever important time to put into your training which is great. Ive been doing this a while since i played football in HS and made weight training and nutrition a hobby of mine which i am constantly tweaking and experimenting with and think im a pretty good resource of info. Specifically, you sound like you have the same body type as i, im 6'1 and 200 lbs at about 8% BF...but this could be lower as ive been getting leaner and havent checked my BF recently. You need to train to your body type and constantly surprise your body to enahcen strength and growth. Here is a good sample routine that can improve on your size as well as strength:

Monday Legs:

Sqauts: 1 warm up x 15
4x 10, 8, 6, 4
Leg Presses: 4x 12, 12, 10, 10
Leg Ext: 4x 15, 15, 12, 10
Striaght Legged Dead Lifts: 4x 10, 8, 6, 6
Leg Curls: 4x 15, 12, 10, 10
Calf Raises: 3x 15, 12, 10

Tuesday Arms: Biceps
Barbell Curl: 1 warm up x 15
3x 10, 8, 6
Hammer Curls: 3x 10, 10, 8
Preacher Curls: 3x 15, 12, 12
Closed Grip BP: 1 warm up x 15
3x 8, 8, 6
Inclined Single armed ext: 3 x 10, 10, 8
Rope Pressdown: 3 x 15, 12, 10
Wrist Curls behind the back: 3x 10
Wrist Curls in front: 3x 10

Wednesday Shoulders:
Barbell Press: 1 warm up set x 20
4x 10, 8, 6 ,4
Upright Rows: 4x 12, 10, 8, 6
DB lateral raises: 3x 12, 10 ,8
Rear Delt Flyes: 3x 12, 10, 8
BB front raises: 3x 15, 12, 10
BB shrugs: 3x 10, 8, 8

Thurs off

Friday Chest/ Tri's:
Flat BP: 1 warm up x 15
4 x 6, 6, 4, 4
Incline DB press: 4x 8, 8, 6, 6
Heavy Dips: 4x 10, 8, 8, 6
Flat DB Flyes: 4x 12, 10, 10, 8
Skull Crushers: 3x 15, 12, 10
Single Arm Cable Ext: 3x 15, 12, 10

Saturday Back/ Bi's:
Deadlift: 1 Warm Up x 10
4 x 6, 6, 4, 4
Lat Pulldown: 4x 10, 8, 8, 6
Bent Over BB rows: 4x 10, 8, 8, 6
Closed Grip Cable rows: 4x 10, 8, 8, 6
Behind the neck pulldowns: 3x 12, 10, 8

Abs and Obliques should alternate every training day varying reps to improve definition and thickness
Rules of thumb for nutrition when trying to increase size:
-2 calories per lb of body weight
-1-1.25 grams of protein per lb of body weight
-1.5-2 grams of carbs per lb of body weight(all should be slow digesting ie whole wheat sources with the acception of breakfast and post workout when fast digesting carbs ie sugar are key)
- 1 gallon of water per day
- cardio 3 days per week to keep fat levels down( should be low impact after workout for prolonged periods )

*different variations for different people as everyone is diff as well as changing your routine every couple of weeks to shock muscles. For more advanced routines and rep ranges to shock the muscle, get at me personally. Good luck!