I designed these pull tabs to replace the thin and brittle ones originally installed on my house's window bug screens. The small hook section is 6mm deep and 3mm tall, which fits snuggly behind the screen's rubber strip (ensure these measurements match your bug screen's). The pull tabs themselves are 30mm by 30mm, just like the originals. They are thicker, though less flexible.

Works great in PETG, although might be more durable with tougher materials.