Option 1: Comma and Parenthesis
* We had, I guess, what you'd call materials delivered to our home.
* This option emphasizes the "I guess" phrase as a parenthetical aside.
Option 2: Comma and Em Dash
* We had — I guess — what you'd call materials delivered to our home.
* This option gives the "I guess" phrase a more dramatic pause and emphasizes the uncertainty.
Option 3: No Punctuation
* We had I guess what you'd call materials delivered to our home.
* This option creates a more casual and conversational tone, as if the speaker is simply thinking out loud.
Option 4: Comma and Apostrophe
* We had, I guess, what you'd call "materials" delivered to our home.
* This option emphasizes the word "materials" by putting it in quotes, suggesting that the speaker is not entirely sure if the delivered items fit that description.
The best option will depend on the specific context and desired effect.