I am getting the Permalip implants in 2 weeks and I am going back and forth on what size to get. My upper lip is pretty thin compared to my bottom so I don't know if I should do 4's for both or 5mm on top and 4mm on bottom. I'd like to do the 5mm up top but I'm worried my lip won't accomodate it well. My PS thought either would be just fine, but I worry if I go with the 4mm it won't be very noticable. Thoughts?