Sequence of ''if/else'' nodes (pls help)

Hello! this if my first post on this community so pls be gentle ^^

Im trying to link the ''size'' variable of a shape node to the ''tile(x,y)'' variable of a tile generator node.

The tile generator it's clamped (1-4)

So i need a node tree like....

If tile number value is 1---- size value---- (0.68) 

If tile number value is 2---- size value---- (0.32) 

If tile number value is 3---- size value---- (0.2) 

If tile number value is 4---- size value---- (0.14) for example

But i dont find a simple way to do this

PLS HELP ME! ^^ 

Thx in advance!