半斤八两

bàn jīn bā liǎng

six of one, half a dozen of the other

Character by character

半bàn
half

斤jīn
jin

八bā
eight

两liǎng
liang

你们俩的水平半斤八两，谁也别笑谁。

You two are as bad as each other, so no laughing.

Tone: negative (criticism).

In the old system a 斤 had sixteen 两, so half a 斤 was exactly eight 两.

Learn it in context

This idiom and thousands more are in Learn Chinese with Bao, with audio, pinyin and drills that make them stick.