I just have got my new board but not sure if it too small

Hi guys,
I am new to this forum and surfing as well.
My height is 183 cm and 73 Kilos weight.
I got my first big short board for 2 months ago measurement 6'10 *21 * 27/8. I have surfed with it several times but I feel that the board is too big for me and it is so hard to duck diving too.
However, I just bought a second hand surf board which is smaller than the one I currently have. The measurement is 6'2*18 1/2*25/16.
I personally feel that it might be too small for me.
Do you guys reckon that I will be able to surf on the new board I just have got?
Thanks so much for your kindly thoughts
.
I am new to this forum and surfing as well.
My height is 183 cm and 73 Kilos weight.
I got my first big short board for 2 months ago measurement 6'10 *21 * 27/8. I have surfed with it several times but I feel that the board is too big for me and it is so hard to duck diving too.
However, I just bought a second hand surf board which is smaller than the one I currently have. The measurement is 6'2*18 1/2*25/16.
I personally feel that it might be too small for me.
Do you guys reckon that I will be able to surf on the new board I just have got?
Thanks so much for your kindly thoughts

