Place your tongue tip near the roof of your mouth behind your top teeth. Push air through the narrow gap. No voicing.

Americans pronounce so as SOH (/soʊ/). You'll hear it in sentences like "Yes, I guess so" or "Why is the traffic so bad today?" — more examples below.
Record yourself saying "so" and play it back. The mic stays on your device — nothing's uploaded.
1 syllable, 2 sounds. Explore each sound's mouth shape and how it's made.
Click any sentence to see the full breakdown — every link, every reduction, every flap-T.