At Payhip.com, you can apply some modification so that your product page layout appears in a single column. The current default layout will two columns. The left is for your content. And the right is for the buy button. I didn’t like this so I modified it using the built-in Design Editor.
This is the CSS that I applied my Design Editor.
.meat-skirt-left { float: none; width: 90%; border: none; border-bottom: 1px dashed #ccc; }
.meat-skirt-left p { text-align: justify; }
And this is how my product page looks like at Payhip.com.
If you can’t find the Design Editor, click on the Account menu on the top right.
Have a great day.