Skyblock Island Size

[TleTur]

Is there any way to expand the size limit of island? I am trying to build a mob grinder and it won't let me finish it..

The first picture is saying leaving my own island..
The second and third pictures are saying that I can't place any block because the island is protected...

 

[Bob2108]

There is no way to increase your island size.

 

[Frijolero]

Any player island is limited to a 100x100 block size and can't be change... maybe you should consider reallocate your mob grinder