Okay, I posted this over in the Machine Embroidery board, but it's also appropriate here... and this place is a lot more active.
On the right is a hat done in white thread with a black lace band, vintage button, and pheasant feathers.
On the left is a hat done in metallic gold thread with a garnet & freshwater pearl band, gold-plated chain with real watch bits as charms and accents. I'd estimate this one took somewhere between 8 - 10 hours.
These were made with the Lace Top Hat design from Urban Threads: http://www.urbanthreads.com/product_details?product_id=3365