Cole Tucker clearly spared no expense when he asked Vanessa Hudgens to marry her ... 'cause the actress was seen rockin' her new engagement ring this week -- and it's HUGE!!
Hudgens was spotted with the bling while out grabbing a bite to eat with her family in Los Angeles on Wednesday -- and it ain't hard to see her MLB player beau picked out some fine jewelry for his future bride.
Sporting an oversized sweatshirt, sweats and slippers .