Dekoni Audio Bulletz Mercury Series Premium Memory Foam Eartips (3-Pack, S/M/L)

My KEF M100 earbuds have very good clarity and detail, and they're a bit lightweight in the bass notes. As far as I can tell the chart is based upon which of their memory foam tips will fit snugly over the barrel of your earbuds (the part you stick in your ear). The M100s aren't listed on Dekoni's matching chart. I emailed to ask them which, if any, might fit the M100s. They replied within 24 hours that their Mercury tips should fit (4mm size hole). Using the small size tips in place of KEF's rubber tips I noticed right away that the earbuds have a snugger fit and they don't work loose or fall out while I'm out for a daily long walk. They are also comfortable; just don't try to shove them too far into your ears - haha. Two more good points are that they help block out a little more external traffic noise and they have improved the bass response that I hear when listening to music. The KEFs are never going to sound big and punchy in the bass, but they are definitely improved when using these little memory foam tips. Haven't tried the medium or large size tips yet. Maybe they'll be even better, or maybe they'll be too big for my ear canal. The idea is to experiment with all three and find the best ones for my ears. Then, maybe later, I can order a pack of just the one size that works best for me. No two people have exactly the same ears, so you must experiment to see what will work for you.