I love to hang our clothes out on warm to hot days.
I just posted a new bag I made a couple of weeks ago. I cut a bag up I got from a past friend and whose fabric choice I did not like and copied the pattern from that. Since I do not know where it came from, I don't think I should share it.
However, follow the links some have posted and then tweak those patterns for your bag.
I think I posted all pics of this under Pictures. Just Search clothespin bag. Tru-Value hardware is where I got some of my pins. Of course the others I use are over 35 years old and stll in good condition because I alway's take them off the line and bring the bag inside.