I have some cheap ass Tuya Zigbee sensors from AliExpress. In my experience they are reliable, quite small, i sill haven't changed the battery, and they are super cheap. Make sure you get the Zigbee ones, not the wifi version.
Cheap e-ink screen from aliexpress, running esphome pulling data from home assistant every 30 seconds. It got time and date, temperatures, time untill the next buss leaves from the nearest bus stops, range on my car, power usage and price, and the three next items from me and my wifes shared google calendar. I got it framed professionally by a local framing workshop. They were a bit confused and hadn't done anything similar before, but they did a great job. My wife isn't always a big fan of my home automation adventures, but she loves this screen!
Edit: For some reason my picture didn't show up. Link here I think: https://vlemmy.net/pictrs/image/0f583c6d-f9b9-4d7a-91cf-6365b2d88d96.jpeg
