First visit to box is hole too small?

Hi everyone,

Today we had our first ever visitor inside our bird box! So exciting Smile. However the box has a 25 mm or 26 mm protector plate fitted which is for Blue Tits, but I am sure this is a Great Tit that visited. It did seem to struggle to get in. (I shall try to upload a video.)

My question is should I change the protection plate to a 28 mm as I think this bird has been looking for a few weeks now and only today finally got in.

Thank you all in advance.