[quote name='Thor' timestamp='1417551187' post='2621678']
I always struggled with ER20's as I have smallish ear canals too! Found them really painful after an hour or so so opted for ACS Pro 17's and an additional set of -20db filters for the metal band I dep for, they are so comfortable to wear, I certainly wont gig or attend gigs without them now.
Money well spent.
[/quote]
There are two sizes, a regular ER20 and a small ER20S. I too had issues with comfort with the regular ER20, but got a set of ER20S and they feel great, and do the job admirably for me.