The filter thread size of Panasonic Leica DG Vario-Elmarit 12-35mm F2.8 ASPH POWER OIS is 58mm.
Below are links to the filters that we recommend you to consider for your Panasonic Leica 12-35mm F2.8:
Read our detailed Panasonic Leica DG Vario-Elmarit 12-35mm F2.8 ASPH POWER OIS Review