Which are the dimensions of the standard China Posr pack for 20Kg? (L/W/H in cm)?

My 2 packs of LZ685087151CN, LZ711986019CN stuck since April 3rd - Warsaw, arrive at the place of arrival. Is it normal? Usually, they reach the recipient on the second day after this status. The Polish Post Office does not see these parcels in the status.

I ordered flower seeds and the return address on the envelope they came in has your address on it. I don't know who you people are. I want to know why you would send me flower seeds with no picture of the flowers on it.And no instructions at all on how to plant these. I ordered flower seeds from other sites too. That I never got. So I don't know what these are. I am American and there's some word on the tiny packs of seeds that is written in Chinese. Am I supposed to guess what to do with them??? And it took over a month to even get them. I don't know what they are.