For Shimano users, we recommend the Quarq DFour DUB Power Meter. Featuring a 110 BCD, 4-bolt configuration, the DFour will allow you to use your current Shimano chainring on your new power meter. The DFour is ideally suited for Shimano DURA-ACE 9100 chainrings (due to cosmetic reasons). Shimano Ultegra R8000 chainrings and 105 R7000 rings will work, however they will not match the shape or color of the power meter as nicely.
You must pair the Quarq DFour DUB Power Meter spider with Quarq DZero DUB crank arms. You can select the size you need right on our product page. You also need a SRAM DUB bottom bracket.
We also have an article with some additional information here.