The filter thread size of Nikon AF-S Micro-Nikkor 105mm f2.8G IF-ED VR is 62mm.
Below are links to the filters that we recommend you to consider for your Nikon Micro-105mm f2.8G IF-ED VR:
Read our detailed Nikon AF-S Micro-Nikkor 105mm f2.8G IF-ED VR Review