LoTF Character Appearance Chart:
I think there used to be one of these, but the person left Tumblr. My copy is the Penguin Great Books copy (teal cover), so it might be different from yours. Bear with me.
Ralph: Fair hair (p. 1), Grey shirt (p. 1), 12 years old and a few months (p. 4), wide and heavy shoulders like a boxer (p. 4), mild mouth and eyes (p. 4), biggest on the island (p 15), Ralph started with hair at half an inch (p 96), bites his nails to the quick (p 96), His mother is dead as he claims mummy was still with them (p 99)
Jack: Tall, thin and bony (p. 13), red hair beneath his choir cap (p 13), face crumpled and freckled and ugly without silliness (p 13), light blue eyes (p 13), biggest choir boy (p. 14), freckled (p 15), sandy long hair (p 39), sunburnt (p 39), tall (p 57)
Simon: skinny and vivd (p 16), straight black coarse hair (p 16), smaller than Ralph and Jack (p 17), small (p 46), darkish in color and tanned deeply (p 46)
Piggy: Wind-Breaker (p. 1), Shorter than Ralph and "Fat" (p. 1), Thick glasses (p. 1), Pale (p. 6), tans to golden brown (p 54), wispy hair as though baldness was his natural state (p 54), different accent than the others (p 54)
Roger: slight, furtive boy (p. 14), dark boy (p 15), doesn't darken by tanning (p 50), black hair down to his nape (p 50), swarthy skin (p 52)
Johnny: Six years old (p. 11), Sturdy and fair (p. 11), well-built with fair hair (p 50), china blue eyes (p 50)
Maurice: second largest choir boy (p 14), broad and grinning all the time (p 14)
Samneric: Bullet-headed with "hair like tow" (p. 12), not enough skin when they smile (p. 12), unsuspected intelligence (p 31), unable to do things apart (p 84)
Mulberry Boy: about six years old and a shrimp (p 27), mulberry colored birthmark on one side of his face (p 27)
Henry: Biggest littlun and distantly related to the mulberry boy (p 49)
Percival: Mouse-colored and not very attractive (p 50)
Phil: Self confident littlun (p 73)
Littluns: A dark little boy (p. 11), Uniforms colored grey, blue, fawn (p. 11), Hair in brown, fair, black, chestnut, sandy, mouse-colored (p. 12)
Extra Information: Simon Robert and Maurice are in a grey area between littlun and biggun (p. 49), Jack's original paint is one cheek and eye socket white red on the other half of his face and charcoal from right ear to left jaw (p 51), Maurice Simon Piggy and Ralph were not present for the first pig killed (p 56), Jack and Ralph both think Africa is a country (p 71), Bill slaps Johnny to get him to stop crying (p 88), Robert laughs at Simon when he bashes into a tree (p 91), Simon predicts his own death (p 98), they bit Simon as he died. They cannibalized him (p 136)