The size of armor depends on the pelt:

Large armor (Barbarians, Ogres & Trolls) = Bear pelts
Medium armor (Barbarians, Elves, Erudites, Half-Elves & Humans) =  Cat pelts.
Small armor (Dwarves, Elves, Gnomes & Halflings) =  Wolf pelts.

Note that you can reduce the quality of a pelt by combining it with a skinning knife.

Below are recipes for creating various items through tailoring:

• Bearskin Potion Bag = Grizzly Bear skin + Silk cord
• Cured Silk Cap = 1 silk swatch + 3 Heady Kiolas + Pattern
• Cured Silk Cloak = 2 Silk swatches + 2 Heady Kiolas [brewing skill] + Pattern
• Cures Silk Gi = 3 silk swatches + 2 Heady kiolas + Pattern
• Cured Silk Gloves = 2 silk swatches + 2 kiola + Pattern
• Cured Silk Gorget = 1 Silk swatch + 2 Heady Kiolas + Pattern
• Cured Silk Mask = 1 Silk swatch + 1 Heady Kiola + Pattern
• Cured Silk Pants = 2 silk swatches + 3 Heady kiola + Pattern
• Cured Silk Mantle = 2 Silk swatches + 2 Heady Kiolas + Pattern
• Cured Silk Sandals = 1 silk swatches + 2 Heady kiola + Pattern
• Cured Silk Sash = 1 Silk swatch + 2 Heady Kiolas + Pattern
• Cured Silk Sleeves =  2 Silk swatches + 2 Heady Kiolas + Pattern
• Cured Silk Wristbands = 1 Silk swatch + 2 Heady Kiolas + Pattern
• Hand-made Backpack (10 slots instead of 8) =  High quality bear skin + backpack pattern.
• Leather Backing = silk thread + low quality wolf/cat/bear skin
• Patchwork Armor = Ruined Pelt (per size needed) + Pattern for type of Armor
• Raw Silk Armor = 1 Silk Swatch (two for leggings and tunic) + Pattern
• Reinforced Leather Belt = High Quality Pelt + 2 Steel Bones + Pattern
• Reinforced Leather Boots = High Quality Pelt (per size needed) + 3 Steel Bones + Pattern
• Reinforced Leather Bracers = High Quality Pelt (per size needed) + 1 Steel Bone + Pattern
• Reinforced Leather Cap = High Quality Pelt (per size needed) + 2 Steel Bones + Pattern
• Reinforced Leather Cloak = High Quality Pelt (per size needed) + 2 Steel Bones + Pattern
• Reinforced Leather Gloves = High Quality Pelt (per size needed) + 2 Steel Bones + Pattern
• Reinforced Leather Gorget = High Quality Pelt (per size needed) + 1 Steel Bone + Pattern
• Reinforced Leather Mask = High Quality Pelt (per size needed) + 1 Steel Bone + Pattern  [may be broken]
• Reinforced Leather Pants = High Quality Pelt (per size needed) + 3 Steel Bones + Pattern
• Reinforced Leather Shoulderpads = High Quality Pelt (per size needed) + 2 Steel Bones + Pattern
• Reinforced Leather Sleeves = High Quality Pelt (per size needed) + 2 Steel Bones + Pattern
• Reinforced Leather Tunic = High Quality Pelt (per size needed) + 4 Steel Bones + Pattern
• Shadow Silk = Shadow Wolf Pelt + Silk Swatch + Scroll of Gather Shadows.  Add extra pelt for large.  Add extra scroll for Inky Shadow Silk.  (These are used for the Necromancer Armor Quests in Solusek Ro)
• Silk Bandage = Combine 2 silk threads.
• Silk Cord = 3 silk threads
• Silk Thread = Combine 2 Spiderling silks
• Silk Swatch = Combine 2 spider silks
• Studded Belt = Medium Quality Pelt (per size needed) + 2 studs + Pattern
• Studded Boots = Medium Quality Pelt (per size needed) + 4 studs + Pattern
• Studded Bracer = Medium Quality Pelt (per size needed) + 2 studs + Pattern
• Studded Cap = Medium Quality Pelt (per size needed) + 3 studs + Pattern
• Studded Cloak = Medium Quality Pelt (per size needed) + 4 studs + Pattern
• Studded Gloves = Medium Quality Pelt (per size needed) + 4 studs + Pattern
• Studded Gorget = Medium Quality Pelt (per size needed) + 2 studs + Pattern
• Studded Mask = Medium Quality Pelt (per size needed) + 1 stud + Pattern
• Studded Pants = Medium Quality Pelt (per size needed) + 4 studs + Pattern
• Studded Shoulderpad = Medium Quality Pelt (per size needed) + 3 studs + Pattern
• Studded Sleeves = Medium Quality Pelt (per size needed) + 3 studs + Pattern
• Studded Tunic = Medium Quality Pelt (per size needed) + 5 studs + Pattern  [may be broken]
• Tailor Made Whip = 1 Medium Quality Wolf Skin + 4 Heady Kiolas + 1 Whip Pattern
• Tailored Large Bag = silk cord + low quality bear pelt
• Tailored Large Belt Pouch = low quality cat pelt + 1 silk cord
• Tailored Wrist Pouch = Ruined Wolf Pelt + silk cord
• Tailored Small Bag = silk cord + low quality wolf pelt
• Tailored Quiver:  High Quality Cat Pelt + Quiver Pattern.
• Wu's Fighting Gauntlets = 4 Heady Kiolas + 1 Greater Lightstone + 1 Vial of Visous Mana + 1 Silk Swatch + 1 Glove Pattern