I made these mobile holo-emitter SD card keychain wallets

Do you think these are a good idea, any criticisms or advice would be great. I designed them from scratch and did a lot of work measuring and doing revisions to make them perfect.

https://www.etsy.com/listing/1639296337/mobile-emitter-sd-card-holder-star-trek?ref=shop_home_active_2&frs=1&logging_key=03a7b8b2abf79d600992a89b7bde9cf28cfb7db6%3A1639296337&variation0=5442396953