The costume will most likely go through some changes for future appearances of Strange, just like with every other character from the MCU.
Through his Twitter, Park shared the following image showing an early concept design of Strange.
The Cloak of Levitation is also slightly different than the final one as this one has a golden seam.
Naturally, Strange’s costume went through many changes during pre-production, and artist Andy Park has shared one of his designs for the Sorcerer’s Supreme gear.