How much semen is enough?

Carla • Happily married💍 mother of four, baby #4born on April 29-2022💗🎀

The other day I asked my husband to try to do a home test for the sperm count, BUT the amount of semen that came out was so little that made me think... maybe this is the problem, maybe he’s not producing enough of that liquid that helps the sperm to get to the finish line 🤔 ... the test was normal btw. So is it normal to have that little?! ... I hope I had a picture to show you guys 😅 ....it was a little more than a quarter size amount ... maybe a dollar size