You can wear necklaces but they either have to be very short or tucked under your shirt. Earrings and gauges are not allowed to be bigger than a quarter, no bracelets or wristwatches, you're allowed one *plain* band as a ring so no external etchings or jewels or anything. You're allowed *one* facial piercing no larger than the size of a dime.
$1 or starbucks.com/dresscode