How long a game is good for your chess improvement?

Hello,

my question is similar than the one asked on http://www.chess.com/forum/view/general/is-blitz-chess-good-for-beginners 

I am a beginner and I play chess for a while but I still don't improve. I realized I play mostly blitz and bullet. It is fun, but it doesn't help me.

What is the minimum length of a game that could help? :)

10min is enough?

You can probably answer this better than anyone else.

When you play minutes, do you miss a lot of obvious moves that you see later on? Or do you find it hard to spot your own and opponents mistakes that you missed in analysis.

If you're missing a lot of moves that come easy to you in analysis, play slower.

Start studying more than playing i.e. through videos, tactic sites, and books until you're itching to play then apply all the ideas you learned. G15/10 on here is pretty good for this, easy to find games to boot.

I would have said 60 to 90 minutes, though it might be hard to find opponents on a web site. If you want to play "quick," try 30 minutes, but longer is better. You need time to analyze a position and find some of the better moves.