Too large/excessive; exceeding an appropriate or desired size, amount, volume, etc. (the -sugiru form expresses excess).
このシャツは大きすぎて、袖がだらしなく見える。
This shirt is too big; the sleeves look sloppy.
会場が大きすぎて、スピーカーの声が後ろまで届かなかった。
The venue was too large, so the speaker's voice didn't reach the back.
音が大きすぎるので、少し下げてください。
The volume is too loud, so please turn it down a bit.