足（あし）を折（お）られた同僚（どうりょう）に：「足（あし）のことを聞（き）きました、お気（き）の毒（どく）な限（かぎ）りです。」

自分（じぶん）を高（たか）めたいという強（つよ）い意志（いし）を持（も）って学（まな）んでいる生徒（せいと）たちの姿（すがた）は、教師（きょうし）にとって心強（こころづよ）い限（かぎ）りだ。

友達（ともだち）１：「この二人（ふたり）が私（わたし）の娘（むすめ）たちです。」 娘（むすめ）たち：「どうぞよろしく。」 友達（ともだち）２：「まあ立派（りっぱ）な娘（むすめ）さんたちですよね。頼（たの）もしい限（かぎ）りです。」

コスタリカ旅行（りょこう）の抽選（ちゅうせん）に当（あ）たったなんて、うらやましい限（かぎ）りだよ。

漫画家（まんがか）は読者（どくしゃ）に感謝（かんしゃ）する：「私（わたし）の漫画（まんが）をここまで読（よ）んでくださり、嬉（うれ）しい限（かぎ）りです。ありがとうございました。」

歌手（かしゅ）のツイッターでの投稿（とうこう）：「私（わたし）のコンサートが中止（ちゅうし）になってしまったという連絡（れんらく）を頂（いただ）き、残念（ざんねん）な限（かぎ）りです。」

<div class='writeup-body'>限（かぎ）りだ is a structure that follows adjectives in order to indicate that something is 'extremely (A)', or 'as (A) as can be'. This grammar pattern is simply a mix of the noun 限（かぎ）り, 'limit', and the auxiliary verb だ, or です in the case of a polite sentence. Therefore, the literal meaning is just that something is 'the limit of (A)', where (A) is some describable feature. 
限（かぎ）りだ will follow adjectives in their standard forms.<ul class='writeup-examples--holder'>
 <li class='writeup-example'>
<div class='writeup-example--japanese'>
こんな私（わたし）のためにこんな素晴（すば）らしい送別会（そうべつかい）を開（ひら）いてくれるなんて、嬉（うれ）しい限（かぎ）りです。</div><div class='writeup-example--english'>
I am very happy that you threw such an amazing farewell party for me.</div></li><li class='writeup-example'><div class='writeup-example--japanese'>


宝（たから）くじで一等（いっとう）が当（あ）たったなんて、羨（うらや）ましい限（かぎ）りだ。</div><div class='writeup-example--english'>
Something like winning first place in a lottery is very enviable.</div></li><li class='writeup-example'><div class='writeup-example--japanese'>


一分（いっぷん）遅（おく）れただけで不合格（ふごうがく）にされるなんて、残念（ざんねん）な限（かぎ）りだ。</div><div class='writeup-example--english'>
It is very disappointing that I failed just by being a minute late.</div></li><li class='writeup-example'><div class='writeup-example--japanese'>


同僚（どうりょう）にあんなことを言（い）われて、不快（ふかい）な限（かぎ）りです。</div><div class='writeup-example--english'>
I am very offended that my colleague said something like that to me.</div></li></ul>
限（かぎ）りだ is a fairly formal grammar point that simply aims to highlight the intensity of traits as perceived by the speaker. As this perception is something coming from the speaker, the adjective itself will often be an emotion that the speaker themselves is experiencing, rather than a direct quality of the object, such as its color or shape. Some examples of this are as follows. 
嬉（うれ）しい - The feeling of happiness, as experienced by the speaker. 
頼（たの）もしい - The feeling of reliability, as experienced by the speaker. 
羨（うらや）ましい - The feeling of jealousy, as experienced by the speaker. 
寂（さみ）しい - The feeling of lonliness, as experienced by the speaker. 
恥（はず）ずかしい - The feeling of embarrassment, as experienced by the speaker. 
心強（こころづよ）い - The feeling of reassurance, as experienced by the speaker. 
As can be seen in all of the examples. The intensity of the adjective is something that will change depending on one speaker to the next, rather than something that the target is doing.</div>

Grammar Info

(Adjective) + 限(かぎ)りだ

extremely, really, very, as ... as one can be