Just received a newsletter from Sennheiser Hearing, that they do offer custom fit eartips for the IE200, IE300, IE600, and IE900. The mail was in German and they seem to work together with Geers, a German hearing aide company / seller.
The link (German): Sennheiser
I had my ears scanned (along with a few others) at the Sennheiser booth in Munich and am supposed to receive custom tips for the IE600 in a couple of weeks or so. I will update once I have tried them out.
Thank you for sharing!
I just checked and I can see that there are 2 Geers offices located in Flensburg, so it would only be a 2,5 hour drive from where I live in Denmark.
I think I will place an order for a pair of these custom eartips for my IE 900 
Looking forward (and waiting for) your review. 
Had an appointment today at the nearest Geers - a 2 hour drive from my place to get to Harislee in Germany.
Geers made imprents of my ear canals that will now be sent off to Sennheiser, so that they can create the Custom Comfort Tips - it should take approx 2-3 weeks.
I decided on black custom tips with left / right marking and a simple engraving, as this was an option.
Looking forward to trying the result in a couple of weeks
The Sennheiser Custom Comfort Tips arrived today
The fit is perfect (as expected) and I have been using them for the past couple of hours.
“Comfort tips” describes it pretty well and I definitely see these as a great upgrade to my already favourite IEM’s.
I have uploaded some more photos in the “What’s in the box!” thread.
Thanks for sharing this experience! Have you noticed an impact with sound quality? Do you miss the tuning foam from the stock tips?
That’s super cool! Didn’t know Sennheiser made custom tips for people. I’m curious - are these malleable/squishy or is it like a rigid resin cast like other CIEM tips?
I think it’s an overall improvement to the sound quality, as I get a better seal than with the stock tips. To me this is especially noticeable in the bass.
The way Sennheiser describes it seems quite accurate (translated from German):
Maximum Noise Isolation: Perfect sealing with a snug fit prevents outside noise from interfering with music enjoyment.
The sealing fit of the ear tips ensures first-class and unadulterated sound reproduction in both ears.
The custom-made ear-tip volumes made of silicone guarantee excellent wearing comfort and maximum grip with each of Sennheiser’s audiophile earphones.
They are definitely not as squishy and soft as the default tips.
They are made of silicone but are a lot firmer.
I made this quick clip, that will give you an idea of the firmness compared to the stock tips 
Oh very cool. My biggest complaint with the new IE line-up was always the tips because they never worked for me. But when I did get it to work with some of my other regular tips, the bass quality is just among the best you can get in an IEM. Glad to see this work out for you! Enjoy them.
There’s an easy fix for the floppy stock sennheiser tips. Just slide in memory foam rings into the stock tips, and they’ll actually work pretty well. Basically the same as the Z-audio render tips.
I removed the foam rings from these cheapies on aliexpress: Memory foam rings
I have mentioned quite a few times how much I enjoy the Sennheiser IE600 IEMs. They became my default set of travel IEMs, the set that I grab first and then think about what else I may want to take with me. They have basically become my go to IEMs for when I am out and about also, due to the fact that they sound great, are very comfortable and are easily stored due to how small they are.
I actually found that I would wear the IE600 on flights underneath a cheap set of ANC headphones (that don’t sound great but have decent noise cancellation).
Earlier this year, at High End Munich, those of us that were present on the press days got the chance to have our ears scanned at the Sennheiser booth and a set of custom ear tips made for the IE series of IEMs. The tips took quite a while to arrive but finally made it some weeks ago and I want to share my experience with them.
I was expecting the tips to be a lot larger than they are. The images I have seen of custom tips by other brands usually fill the ear much more, yet these are tiny and only fit over the actual nozzle of the IE600, fitting completely inside the ear canal.
While it is great that they are so small, making a set of very compact IEMs even more compact. At first it took me a while to get them to seat properly and seal well, mainly due to not ever trying custom molded tips (or IEMs) before, but when I finally found the correct seating, I was amazed at how well they sealed and how the isolation of the IE600 increased 10 fold. I could feel the perfect match to my ear canals and it blocked out almost all of the external sound.
The issue came when I went to remove them. As they are so small and fit my ear canals so tight, the IEMs come out of the tips easier than the tips come out of my ear! I have since had some practice and being very careful to use the exact angle upon removing does allow them to come out… most of the time. There are still occasions when I will accidently move a millimeter in the wrong direction and the tips stays in my ear. Trying to get the tip out of your ear is not a fun job, although I am getting a little better at it 
The first time took around 40 mins to finally get them both out, now it’s just a minute or so of messing around.
As I said, I don’t know the price of these tips but the improvement in isolation and bass presentation are something that I would consider well worth an investment.
The custom tips are at 165Euros (about 180US$). But it gets cheaper (a bit) when bundled with an IEM.
Sennheiser’s (German) website: Sennheiser
PS: an thanks for that review. Now I am tempted.
So that’s 165 plus the scan I guess. Not cheap but I would say worth it if you are a fan of the IE series and use them a lot.
No, the way I read the Sennheiser page, the 165Euros include the scan.
If it includes the scan, that makes it a much better deal (at least around these parts, a scan is between 50 and 80€ approx), although I guess you need to be close to a Sennheiser dealer that does it.
It would be great if I could get my scans from them but I think it’s fair if they don’t send them in my case as it was a promotional thing (i.e: free).
Sennheiser has a cooperation with the German hearing aide franchise Geers. They do the scan in their stores, and iirc you can pick-up the tips there as well.
I had my impressions made at the nearest Geers in Germany, as part of Sennheiser’s price of 165 Euros.
I live in Denmark, so it was only a 2.5-hour drive.
Geers sends the impressions/3D scans to Sennheiser, who then make the Custom Comfort Ear Tips and send them back to Geers.
The standard procedure is to pick them up from Geers again, as they will also check that they fit properly, but in my case, it would be silly to drive to Germany just for that. So it was no problem at all for them to just send them to me in a small package when they came back from Sennheiser.
Just returned mine. They hurt to wear. The angle on the nozzle was too acute. Also the connector shorted out when turned at the slightest.
Most of all the treble was unbearable. For certain songs (that don’t have much treble) it was neat. The bass was awesome. When listening to alt-rock it was a buzz kill.
