This is a handmade "Mashiko-yaki" slide bar/bottleneck that I had specially made! (*´∀`*)! It turned out great, but because I didn't specify my finger size, it ended up being too narrow. It's just barely big enough for my pinky finger, and the joint gets caught, so I can't play it... (＞＜。 It's a "like-new" item, as I've only tried putting my finger in it! My fingers are thicker than the average woman's, so it might fit women, children, or men with slender hands! LOL I'd like to sell it to someone who can use it! m(_ _*)m The inner circumference is 4.8cm, as I wrote below, so if you want to put your finger in it to play, "please measure your finger size first!!" and only buy it if it seems like it will fit!(*´∀`*)! If you use the technique of pressing down from above without putting your finger in, the size shouldn't be a problem! Also, if you're buying it as a collector's item, that part doesn't matter... m(_ _*)m I also received a slide bar of the same series that fits, and ceramic slide bars have a very warm and pleasant sound, so I highly recommend them♫ (*^_^*)/ ＜Size＞ Length: 5.2cm Thickness/Diameter: 2.4cm Inner Circumference: 4.8cm I will wrap it in bubble wrap and ship it immediately via Yu-Packet Post mini! ( ⸝⸝⸝ ᐢ ᵕ ᐢ ⸝⸝⸝ )! #MashikoYakiSlideBarTilePatternMelmoo BottleNeck Blues For Women For Children Prototype Guitar Southern Rock Blues Guitar