What did I do wrong?

Ive had my ears pierced about 20 years and can't get these 1.6mm glass plugs in. Do I need to be pierced with a larger gauge? I can get them in through the front, but they won't go through the backside without it feeling like i might rip something.

What am I missing?

Ive had my ears pierced about 20 years and can't get these 1.6mm glass plugs in. Do I need to be pierced with a larger gauge? I can get them in through the front, but they won't go through the backside without it feeling like i might rip something.

What am I missing?