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

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

Movement of nipple in Elvie stride flange...which is correct?

Does this mean my flange is too small?

Flange sizing

Flange sizing

big flange or little flange

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

Flange Fit

Am I using the correct flange?

Proper flange size ? Please help me..

Help with flange fit please. Video