I use Japanese size dragon shield inner sleeves (perfect fit) and dragon shield Japanese size outer sleeves. I just buy the sleeves from my local OTS. The Amazon links are just for reference.

Here’s an Amazon link to both:

Dragon Shield Clear Japanese Inner Sleeves 100 ct Card Individual Pack https://www.amazon.com/dp/B09JN4P1JP/ref=cm_sw_r_cp_api_glt_fabc_90PP2SPJ5Y6145HSTJZT

Arcane Tinman Sleeves: Dragon Shield Matte Japanese Black (60) https://www.amazon.com/dp/B06WP699BM/ref=cm_sw_r_cp_api_glt_fabc_B76CCZPJ0BCA54XS75P1