31 inches long 6 inches thick virgin untreated barely heat styled dark brown hair

My hair currently is 31 inches long, 6 inches thick and is dark brown in color. I have loved and nurtured my hair for so long hence it is virgin, not chemically treated, healthy, voluminous, smooth, and barely heat styled ever. I nourish my hair with olive/castor/almond/coconut oil, hair mask (such as hibiscus, curd, rice water) etc. every week without fail. I wash my hair two times a week with a dermatologist recommended products. I do not have any dandruff or any hair infection or related allergies/diseases. I am a healthy eater who exercises regularly and has a healthy lifestyle. I do not even smoke or drink. I will get my hair freshly cut by a salon on demand.