The filter thread size of Panasonic Lumix G Vario 12-60mm F3.5-5.6 ASPH Power OIS is 58mm.
Below are links to the filters that we recommend you to consider for your Panasonic 12-60mm F3.5-5.6:
Read our detailed Panasonic Lumix G Vario 12-60mm F3.5-5.6 ASPH Power OIS Review