Well, before the panic attack sets in, let's look at the instructions. I know, instructions are for dweebs. The membership screening here is lax, and I got through.
Several sources indicate that the CE approved armor in the knees is adjustable, utilizing velcro.
Now for the "unsolicited advice". Built in armor is kind of convenient, and better than bare skin. But. The problem I find with most built in armor protection is that it is generically placed in generically sized off the rack gear. The seating on a sport bike is different than a KLR 650 is different than on a cruiser. They need to design these pants to "cover all bases". In the process, there are some trade offs. Sad part is, one of the trade off's is in the protection. Standing on the sidewalk, my knee armor droops a little below the knee. Seated on the bike, the knee armor rides up on my knee. What position will my knee be in when I'm tumbling down the road at 60 MPH? I dunno either. Nor do I know where my knee protection will be riding. Things happen pretty fast during most get-offs. My Aerostich armor stays in place. My other gear's armor is about as much lucky charm as it is functional. Solution? If you have a weak spot that you need protected, buy armor protection specific to the area. Throw away the crap in the suit. Do yourself and your knees a favor and get some "strap on" knee armor such as KNOX "cross knee" guards. You can ditch whatever armor comes in your pants and wear them. That way, you'll have PREMIUM knee protection no matter what position your knees/legs are in (walking, standing, crouched...it's still where it should be). Doesn't matter how your legs are bent, how many times they hit the ground, and will be familiar to you as they are ALWAYS in the same (proper) spot ALL the time. A side benifit of this is that the same pair of knee armor can be used under ANY pants you have, thus always feeling the same and comfortable.
What am I saying? I'm saying that your built in knee protection is not something I would count on in a crash. They move. Unpredictably. There are too many if's and maybe's to rely on the built in pants protection.
Your local motorcycle shops will have these or a version of them. Yes, they may be five or six dollars higher than on the internet. But you get to try them on and make sure they fit. And go on your trip.
And keep asking questions about safety equipment. And fit. If I jump from a plane, I do not want the bargain brand parachute, nor do I want a sweat shop packing it. What we are doing is not that far removed.
I don't have economy knees. They get better than economy protection.