I have had this issue of buying clothes that are too large for me lately. I have a few items that I would wear more often if I didn't have to pin the waist everytime. I'm not sure why I keep overestimating my size.
It hasn't really been an issue until recently when after I reserved a dream item and realized the skirt would just be too large. The brand was very nice about swapping sizes when I emailed, but why do I keep doing this? I measure myself and then I just...ignore it? Assume I need too much wiggle room? Does anyone else have this problem?