“In the pentagram, the Pythagoreans found all proportions well-known in antiquity: arithmetic, geometric, harmonic, and also the well-known golden proportion, or the golden ratio. … Probably owing to the perfect form and the wealth of mathematical forms, the pentagram was chosen by the Pythagoreans as their secret symbol and a symbol of health. - Alexander Voloshinov As quoted in Stakhov”
― Alexey Stakhov, Mathematics of Harmony

Pentagram Circle Vest . Pattern includes sizes Small to 3X.
Size is determined by hook size.

It is written in American Crochet terms. There are pictures of almost every round.