How do you know when you should no longer be classed as a junior designer

The years of experience is very important to define when a designer is not junior anymore, but as well its the field of design and the intensity and size of projects that he was achieving .

I feel that sometimes it's determined by how you feel.
As a junior you are still learning and gaining experience on what it is to be a designer and how to do it well.
Sometimes that can take 1 - 2 years, but sometimes that can be longer.
Perhaps you decided to move to another company after 1 year, or you were made redundant, or the company you work for isn't pushing your skills to the limit.
You may find that all those cause set backs and in 1 - 2 years of working as a designer you're still not 100% confident in what you do.
In this case I'd probably still deem myself a junior, and would need a little more work before I could move on to mid-weight.
But after 1 - 2 years, if you feel you've gone as far as you can go knowledge wise without feeling like you're being tested anymore, you've freelanced and notched up some mega experience, you may feel like mid-weight is calling your name and you want to make that leap.

I'm not a designer but I have worked with many talented designers throughout the years, there is a point where your mind allows you to read a design brief or talk to a customer about what he/she wants and really feel what it is you have to do, you wouldn't need to make 5-6 different designs to see which one relates more to what the customer wanted, you can get it done in 1-2 attempts, a part of this comes from experience, a part coming from your ears as you will have to really listen and understand, but a more important part comes from your heart, this point is where I would say you should no longer be classed as a junior designer, you might reach this point after a year, and some designers never get there at all, so I don't think there is a timing guideline for this.

it is based on how you solve problems outside the book.

compare your work to your co- graphic designer, when your Sr. graphic designer say's your work is better..

Hello Roba Al-Assi , Thank you for Inviting me to Answer this Question I would leave this to Employer / Decision Maker.
It’s their Decision to Take a Call based on Employee’s Performance.
But however, as per the General Standards: ~ UpTo 1 Year is Considered as a Trainee ~ Between 1 to 3 Years is Considered as a Junior Designer ~ Depending upon Skills, Ability and Experience, one should be able to Decide when you should No Longer be Classed as a Junior Designer

When you know as much as the senior designer......

Designer should not be a junior He is always a creative person.
He will create things and make it better and better.