I can not wear so many metals....even true gold. These are absolutely the best. Wish they came in other varieties.The post was not straight...inserted into the pearl at a slant. Returning. 4 mm very tiny. Will try again, and will order 5 mm, with the hopes that the post/pearl will be straight!...SEE NEXT LINE!Pearl straight on 5 mm! Gave as gift. Also ordered 6 mm which are lovely, comfortable and post was straight! The pearls are fresh water pearls...not plastic...and they are holding up after washing my hair every other day for several weeks. I have had absolutely no reaction to these...most unusual for me! Excellent purchase! TY! ADDENDUM: AFTER 3 weeks, the pearl fell off the post and I had to throw them out!! I couldn't glue it, as the posts are short and it oozed out over the pearl. Very disappointing!I have a hard time wearing earrings because of allergic reaction but these did not. Was very happy with them but they came apart after 2 months.Pretty! But a bit smaller than I thought they would be so I ordered a bigger sizeGood quality . I am extremely allergic to fantasy earnings these have not given me any issuesPearls kept falling off post! Now lost.I was looking for some earrings that wouldn’t irritate my ears. These are great!I bought these earrings because I am extremely sensitive to metals. I have been wearing them 24/7 for a month and a half now, and my ears are happy. No problems, no pain, no redness or swelling. So far so good. Then, I realized that the shine on the pearls was rubbing off, showing white plastic underneath... they are not real pearls! The website listed them as real freshwater pearls... that’s disappointing.