For this tutorial I will use a pizzabox head(command) from heads.freshcoal.com:

/give @p skull 1 3 {display:{Name:"Pizzabox"},SkullOwner:{Id:"9cc39003-9d47-423d-9097-131bbbf51f6c",Properties:{textures:[{Value:"eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvOTk1ZjM5NWUyZDk3ZjhjOTEzMzhjNWM1NTMyYWQ0ZDY3YTcyODQ1Mjg1ZDhiYzE1MmUxYzVkNjA0ZDllYyJ9fX0="}]}}}

We are going to use the bold part later. To start we need to place a commandblock with a (double)slab or stair on the south side of this commandblock and a button to the other side of the commandblock (see picture below). You need to use slabs,stairs or glass since the other blocks won't let light trough and will give us a black head.



Then we need to combine our command from heads.freshcoal.com into the command below. We need to paste the bold part of the first command into this one below:

/summon ArmorStand ~0 ~-1.5 ~1 {Rotation:[45f],NoGravity:1,Invisible:1,Invulnerable:1,DisabledSlots: 2039552,Equipment:[{},{},{},{},{id:"minecraft:skull",Damage:3s,Count:1b,tag:{SkullOwner:{PasteTheBoldPartInHere}]}}}}]}

Paste this command into the commandblock and run it. Voila, you have a pizzabox on your table!

If you want a better understanding of the command we just put in the commandblock, please read the information below, I break the command in parts to explain what we use it for in this example.

~0 ~-1.5 ~1 - With this first part we can change the position of our armorstand. You can use x,y,z coordinates or relative coordinates (~x ~y ~z), I find the last one easier to use and much better if you want to share your creations. If we change this to ~0 ~-1.5 ~2 you will see the armorstand will move one block away from the commandblock (because we changed the Z coordinate).

{Rotation:[45f] - Rotation of the armorstand itself (0-360 degrees)

NoGravity:1 - Makes our armorstand float, we need this to position our armorstand in a good way (1=True, 0=False)

Invisible:1 - We don't want to see the armorstand, I recommend to set this to 0 when you start so you can easily edit the position of your armorstand. When you are happy with the position you just set it back to 1.

Invulnerable:1 - To make sure the armorstand isnt vulnerable for fire or tnt etc.

DisabledSlots: 2039552 - Will disable any possible interaction with the armorstand. We don't want anyone to break our beautiful creation :).

Equipment:[{},{},{},{},{ALotOfStuffHere}] - This last piece will set a custom playerhead on the head of the armorstand.

I suggest to play a little with the position and rotation to get the armorstand in the place you want!
There are a lot more tags you can add. For example tags to put the playerhead as equipment in the hand of the armorstand instead of its head. Or to create a smaller armorstand to make a smaller pizzabox etc.

And last but not least, you can easily remove a visible armorstand in creative by leftclicking it. But if it is invisible it is not possible to do this, therefor you can use the command below:

Vanilla minecraft:
/kill @e[type=ArmorStand,r=3]

Spigot/bukkit (works only in a commandblock for now?)
/minecraft:kill @e[type=ArmorStand,r=3]

WorldEdit
/butcher 3

The number 3 is a radius of 3, you can change this in whatever radius you want/need to remove your armorstand.