Looks pretty good, but I found myself wanting the "main" picture to be completely in focus and almost a straight-down kind of thing, rather than a slanted view. Look at the shop of Lorelei Eurto, lorelei1141 (including the sold section). She's very successful, her pieces are similar to yours, and her photography style is similar to yours. One thing I LOVE about her shop is that she almost always shows the piece being worn (usually by herself; I guess she uses a timer on her camera). Some of her pieces I've felt kind of leukwarm about until I saw the picture of her wearing it, and then I thought "wow!" Even if you have to get a mannequin, or use a neighbor, I think it's something worth doing. I also know that she does most of her photography in the early morning light; I've heard early evening light is good too. I think that's a contributing factor to how good her pictures look.
Your closeups are good, but I'd say that EVERYTHING in the shot should be in focus. I know photography is a challenge; I'm struggling with it myself and I haven't even opened my shop yet. Your descriptions and measurements are also good.
Overall, I think you're doing excellent for a newbie. I hope to be able to do as well.