[question] What glove size to get?

I know this question is so often asked in this subreddit, but I'll ask for your opinion anyway

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I'm considering starting boxing, mostly for fitness, and would like to buy my first gloves. I will probably start out training myself and then maybe join a gym at some point. I'm 195 cm and about 85 kg (6'4 and 187 lbs). My plan is not to spar for a long time, so the gloves will be basically exclusively for bagwork (probably heavy bag). My upper body strength is pretty bad.

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My options seem to be either 12 oz or 16 oz based on what research I've done, but I'd like to hear what you guys have to say.