For wall charts I usually snag them free at trade shows, but Here is one on Amazon: https://www.amazon.com/Morse-Heavy-Large-Plastic-Chart/dp/B07J57XZXS/ref=pd_sbs_1?pd_rd_w=RpdRj&pf_rd_p=ed1e2146-ecfe-435e-b3b5-d79fa072fd58&pf_rd_r=T4SCXWQP9CDZMWN33AV8&pd_rd_r=2bd8b119-e459-4fe1-b4ad-eb25f204fa30&pd_rd_wg=U19JP&a...
Of course you can always use anything that inspires you. Have some fun.
http://www.penntoolco.com/spi-decimal-equivalent-wall-chart-fraction-wire-gage-letter-metric-sizes-98-034-2/ . Or try Amazon Morse Heavy Duty Large Plastic Wall Chart - Decimal Equivalents, Recommended Drill Sizes for Taps, and Useful Formulas https://www.amazon.com/dp/B07J57XZXS/ref=cm_sw_r_cp_apa_i_0HsdDbH62PD4J