Do I have elastic nipples? Wrong flange size? Please help lo

Which flange size fits me better? 13mm or 15 mm

Flange fit help? Went from 24mm to 19mm, still in so much pain.

Elastic nipples or wrong flange size?

Flange sizing

big flange or little flange

Help! Is this flange too big or too small or just right?

Can someone help me with flange size? I felt like 17mm was rubbing

Flange Fit

Am I using the correct flange?

Correct flange size?

Proper flange size ? Please help me..