Without more context, this looks like a or tumblr search string looking for a story where:
Sizing is standard (S–XXL), with specific fit data provided for models (e.g., a size Small typically fits a 32” bust/5’3” height). dd girlx marisol pb polly txt top
If pb = (rare but used humorously in some fandoms), maybe leave it out unless you're sure. Without more context, this looks like a or