How long does a package from UK Royal Mail take to arrive in US (California)?

[maitra_umg4kgyfg]

I ordered hair dye from the UK about 2 weeks ago and the estimation says that it should arrive Sept 3 - Sept 10. The seller sent it through Royal Mail without tracking. I haven't seen anything arrived yet and it kinda makes me worried. And let's say that the hair dye might contain restricted and prohibited chemicals or whatever that they have to discard, would they at least notice me? I really don't think the hair dye contains anything dangerous but just a scenario. 

[karl*katz]

With all due respect the 10th is not until tomorrow and those times are just estimates.

You have up to 45 days from the time of purchase to open an item not received dispute.

Although I would never wait longer than 40 days.

You are worrying way too early.