A remix of my tiny compliant clips with some added attitude. These compliant mechanism clips are only 15mm wide and yet they're functional! It's an easy print, no supports required, works right off of the bed.
I printed mine with MatterHackers PRO PLA at 100% infill. PLA will lose clamping strength if left in the open position for a long period of time, especially at higher temperatures. ABS or ASA, and PETG may be suitable options if you need to maintain the original strength over time.