Very similar; much the same. Used to say there's little difference between two or more items or options.
この二つのカメラ、値段も機能も似たり寄ったりだ。
These two cameras are much the same in price and features.
どの店も似たり寄ったりで、どこで買っても大差ない。
All the stores are pretty much the same; there's no big difference in where you buy.
彼と彼女の成績は似たり寄ったりで、どちらが上か決められない。
His and her grades are much the same, so it's impossible to decide who is better.
両案とも利点と欠点があり、似たり寄ったりだ。
Both proposals have pros and cons and are much the same overall.