How to order PCBs from gerber files

EasyEDA ordering info:

34.3mm Max* 17.8mm Max;
Layers: 2;
PCB Thickness: 1.6mm;
PCB Qty.: 30;
PCB Color: Green;
Surface Finish: HASL;
Copper Weight: 1;
Panelized PCBs: 1

Gerber files released under https://creativecommons.org/licenses/by-sa/4.0/