I created this articulated dragon all by using hearts. the model can be scaled up, but I would not advise scaling it much lover as some parts might get too thin with decreased size.

Print specifications of this model:

Print Dimensions: Height = 2.8 cm (1.11 Inches) | Base = 16.3 cm x 16 cm (6.42 Inches x 6.3 Inches)
Model length while in a straight line: 50 cm (19.69 inches)
Layer height: 0.2 mm

Infill type: Gyroid

Infill percentage: 12%
Print speed: 250 mm/s 

Print time: 3 hours and 11 Minutes

Amount of material required: ~ 21.5 m (65.5 g of filament)