I think of it being a gift that fits through the letterbox, and is usually sent directly to the recipient. You see the description from flower companies sometimes and have the advantage of being easy to deliver when someone’s not expecting a parcel. If it’s flowers they’re cut and packaged into a box and the recipient can get them out and arrange them themselves. Not sure if my tea towels would count, but they definitely fit through a letterbox 
https://folksy.com/shops/LDRIllustration/collections/259039-tea-towels