Hi! Congrats on your purchase: Happy 40th! I just went through a similar debate at 45 (gulp) and decided that the large would make me feel MUCH better about it. Something about jewelry shopping also really helps with pandemic anxiety! I wear them alone daily since I got them (not a pendant person), with my ering and eternity band, both oval, which pair nicely with the Victoria earrings I found vintage (the ones I got are on the chubbier side and closer to 2 TCW per the original Tiffany paperwork). The color and other specs match my wedding jewelry perfectly. Ultimately I'd love 2.5+-3.5+ studs, but they are ridiculously expensive for the price/quality, and Tiffany really knows how to make earrings sparkle, which is the whole point. They came with jumbo/monster platinum backs, which is actually perfect for me because I dislike pousette backs and the smaller original ones would have likely drooped (they're like these, but look smaller on my huge, thin and rapidly aging earlobes:
https://www.1stdibs.com/jewelry/ear...diamond-platinum-large-earrings/id-j_6060112/ ). The older large models closer to 2 TCW appear to have come with pushbacks vs. poussets...I just have to avoid running a marathon with them on! They feel very comfortable and secure with the jumbo backs, though. Cheers and enjoy!