The Denmark Skin is one of the 66 currently available skins in Slither.io. It was previously only available if you shared the game on Facebook or Twitter or ran setSkin(snake,18).
The skin represents the country Denmark, which is evidenced by its number, 18. The Sweden Skin is 16 and the Finland Skin is 17. You can also see the flags of Indonesia, Monaco and Austria in it. The skin is very similar to the Poland Skin.
United States | Russia | Germany | Italy | France | Poland | Rainbow | Sweden | Finland | Denmark | White | Green/Purple | Brazil | Ireland | Romania | ArcadeGo | Block | Yellow/Grey | JackSepticEye | Lithuania | Black/Yellow | Lavender/Indigo/White Star | Light Blue/White Star | Indigo/White Star | Orange/Black | Google | Red/White/Pink | Blue/White/Periwinkle | Kwebbelkop | Golden | PewDiePie | Jelly | Slogoman | Google Play | Red/Periwinkle | Silver | Canada | Switzerland | Moldova | Vietnam | Argentina | Colombia | Iceland | Spain | Blue Gradient | Red Gradient | Yellow Gradient | Orange Gradient | Magenta Gradient | Green Gradient | MasterOv | United Kingdom | Multicoloured Gradient | Bonkers | Red/Black | Blue/Black | FGTeeV |