The bottom width is about 56.5-57.5mm. It's closer to 57mm. The nut width is about 42mm. Tuner hole 10mm. The truss rod is working properly. The neck is very beautiful. I'm sure you'll like it. It's on sale now. Thank you. The necks of this batch of guitars are so beautiful that they are sold at wholesale prices. Many dealers get their products from my factory, so the price is very cheap. If you believe me, you will buy it once. I am sure you will like it and become a repeat buyer, because my guitar neck is a high quality product. I hope we can cooperate. Thank you.