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彼の話はばかばかしいと言ってもいいくらいだった。
His speech verged on the ridiculous.

I've been trying to find some more complicated examples in the net. Here is one of them. It shows くらいだ can also be preceded by a phrase.

Cool, thanks!

The usage of くらいだ／ぐらいだ　with the meaning of So A, to the extent A
Shows the extent or degree of something (which usually precedes this expression) seems to be too complicated for N5. At the top of that section is says that it is N2, so I am not sure why it shows up in the N5 grammar section. When I read through examples of how it has been used by others, I get confused.

For example:
病院にいったぐらい、走り過ぎた。
I ran so much that I went to the hospital.

I would have thought that it would need to be:
走り過ぎるぐらい、病院にいった。

Also, does the だ need to come straight after the くらい?

I would really appreciate some more help on this grammar.

Do not have time to address the rest, but the N5 grammar is the third usage pattern; the first two are closer to N2.

I'm not too sure how to answer the だ question. だ is the informal copula of です so it really just depends on the situation. I would generally just leave だ off completely in speech or emails if くらい happened to be at the end of my sentence unless I was really stressing something and then would probably use だよ.

Thanks for the answers. In regards to the だ I guess I was just confused because in most grammar patterns they assume we will know to put a copula (だ、です、etc) in the sentence in the appropriate place (or not use it) but in this explanation of grammar it specifically states くらいだ which makes it look like it is something that always goes together. I noticed in many of the examples though that the copula is not used. Thus my confusion.

Fixed!