Denmark national team jersey from DBU by Hummel + official name and number kit from Jetsport. The national team jerseys come without sponsor logo, while on the other hand compared to club jerseys they come with a front number. Usually 10-11 cm tall.
Thus a player jersey and a custom jersey look the same at the front.
On the back the name will differ while the style of printing will be the same regardless of it being a player name or a custom name.
If the jersey had been by the player Simon KJÆR the number 4 would have been the same as in the example of the custom jersey.
But the name would obviously have been different.
Another angle to provide better lightening and thus sharper colors.