I am purchasing a new G5 meta-peep and i was wondering what size to get. Should i get the 3/16, 1/4, 1/8?

Depends on how large the ring on your sight is and if you want to use it for hunting or target applications.

I hunt mostly so went with a 1/4" for better low light sighting.

I too use the 1/4" peep. I have a friend that has the smaller diameter one and when I shoot his bow, I have trouble seeing through it. I like the 1/4" on mine because the peep lines up perfectly with the housing on my sights. This makes just one more thing that can help me be more consistent.

Personally I think the 1/4 is to big. I use the 3/16.

i use the 3/16

!/4 and I like it.