(Image source) [ID: four black and white photo's of a person demonstrating how to wear a simple wrap top made out of a rectangle with a neckhole and straps at the sides.]
Easy vintage wrap top
This vintage wrap top design is an easy beginners project: you don't need a pattern, you can customise it to your own size, and despite lacking stretch it doesn't require any zippers or buttons.
The top is made out of woven fabric and consists of a rectangle in which a hole for the head is cut. Straps are added to the short sides of the rectangle to tie the top around your body.
There's a lot of variations on this top: to see examples, check out these written tutorials by Sew What Gilly, Freshly Given, Gina Michele, Sadie the Sewing Machine, The Thread, and Mood Fabrics.
AssunDIY on Youtube also has tutorials for two variations on this top: a rectangle shirt version and a butterfly shirt version.
Given the simplicity of this top, it's a neat way to use up old bed sheets and such.
Some examples:
(Image source 1) [ID: a person standing in a kitchen while wearing a gray wrap top with t-shirt-like sleeves and a round neckline.]
(Image source 2) [ID: a gray wrap top lying on a wooden floor. The top consists of a rectangle with a hole cut in the middle for the head. Two sets of straps, one thin and one thick, have been sewn to the sides of the rectangle.]
(Image source 1) [ID: a person modelling a royal blue wrap top with large sleeves and a slot neckline.]
(Image source 2) [ID: a royal blue wrap top lying on a tiled floor. The top consists of a rectangle with a hole and a slit for the head, and thin straps at one end of the rectangle and thick straps at the other end.]
(Image source) [ID: two photo's. Photo one shows a person wearing a wrap top made from a dark blue fabric with white flowers. The top has very wide sleeves. Text: "Free pattern + video". Photo two shows the same top lying on a white background. It has a drop-shaped neckhole, two sets of straps (one thin and one thick), and round bulging sleeves.]