How to Find out What Size Speakers Fit My Car? : How to Measure?
How to Measure for a Replacement Speaker : 10 Steps - Instructables
6 inch * 9 inch Oval Speaker Paper Cone ( 230mm*160mm*25.5mm) 45mm Height With Foam Edge Linen inside Woofer Paper Cone|Speaker Accessories| - AliExpress
How to Measure Car Speakers? – Improve Car Audio
6.5 inch Loudspeaker Paper Cone (155mm*138mm*120mm*39.5mm) 30mm Height With Rubber Edge Speaker Woofer Paper Cone|Speaker Accessories| - AliExpress