Regular size capsules, not too big or small. No aftertaste or burp up like with B complexes. Started taking Magnesium for AFIB. I found some articles about Magnesium Taurate specifically being effective for AFIB, so I bought these to see if there was a difference. I was using Magnesium Glycinate previously after my cardiologist recomended magnesium after a test showed I was low, but didn't specify which kind. Each persons body and how it reacts to different things are just that, independent to each person. For me, the M Glycinate did help some, but this M Taurate, helped a LOT and I recommend it to others to try and see if you get good results too.