[Plugin: WordPress SEO by Yoast] Change excerpt length to 141 chars – %%excerpt%%

Hey there.

I know this is a late reply, but I’ve seen this question asked a few other places so I thought my solution my help others.

In the file: wordpress-seo/inc/wpseo-functions.php – around line 177 (search for 155), you will find two instances of ‘0, 155’.

Simply change both of these to ‘0, 141’ – or whatever you want. I set mine to 100.

Then:
%%excerpt%%… %%ct_product_tag%%: Learn more. Buy online.

creates a pretty neat meta description around 150 chrs with a nice bit from the description, the brand, and then a little sign off line. Works pretty good for a large catalogue as a fallback default.

NOTE: you probably will need to make the changes whenever you update the plugin. Don’t know if there is some way to avoid that.

Hope that helps.

Cheers.

MQ