The filter thread size of Panasonic Lumix G Vario 14-140mm F3.5-5.6 II ASPH Power OIS is 58mm.
Below are links to the filters that we recommend you to consider for your Panasonic 14-140mm F3.5-5.6 II OIS:
Read our detailed Panasonic Lumix G Vario 14-140mm F3.5-5.6 II ASPH Power OIS Review