/ic/ - Artwork/Critique

this is probably a stupid question, but i am a bit stumped here. so i have been going at it for 1 1/2 months now, but i am having trouble with drawing small features when drawing on DIN A4. The reason i draw on this format is because i can get this copy paper for free and i use my monitor as a lightbox to check my proportions and correct stuff. but at this size, when doing a full human, the features become very small and individual strokes are already thicker than entire fingers/toes which makes it look really weird when i try to draw them in. how do you guys deal with this?