I got my ears pierced today and I really don't like the starter earrings. I bought a second pair at the piercing shop and the guy said to wait at least 2 days but he's had girls pierced who change them the next day. Everywhere I looked online said 4 to 6 weeks was the shortest wait time to change them for the first time. I wouldn't have them out for long, just clean the area and the earrings, take them out and the new ones in immediately. The new ones are surgical or stainless steel I can't remember which and are the same size as the starters. If I have to have the starters in for a month fine, their not that bad but I really like the second pair.