Amazon has Universal Waterproof Case, Cell Phone Dry Bag Pouch (Various Colors) on sale for $9.99 – $6.49 w/ promo code D2KQL6SB = $3.50. Free Shipping with Prime.
Pick your color:
Fits most Smartphones 6" diagonal (iPhone, Samsung S Series, Pixel, Huawei, etc.)
"B" rating on fakespot
https://www.amazon.com/dp/B018FQ4DY4