Here are the numbers I just got off of the digital postal scale here at work...
(Note that I added the Gen Con exclusives and I went ahead and weighed each every booster and flagbearer)
MASTER SETS
Master Set 1: Rise of the Valkyrie
Weight: 5 lbs 7.9 oz
Master Set 1: Rise of the Valkyrie (with Elite Onyx Vipers)
Size: 23.25 x 11.5 x 3.5 inches
Weight: 5 lbs 9.0 oz
Master Set 2: Swarm of the Marro
Weight: 4 lbs 3.0 oz
Marvelscape: The Conflict Begins
Weight: 2 lbs 7.3 oz
LARGE FIGURE EXPANSIONS
Orm’s Return: Heroes of Laur
Weight: 13.9 oz
Raknar's Vision: Heroes of Lindesfarme
Weight: 15.5 oz
Aquilla's Alliance: Heroes of the Quagmire
Weight: 1 lb 1.8 oz
TERRAIN EXPANSIONS
Road To The Forgotten Forest
Weight: 1 lb 13.5 oz
Volcarren Wasteland and Guards
Weight: 15.8 oz
Thaelenk Tundra
Weight: 1 lb 11.5 oz
Fortress of Archkyrie
Weight: 3 lbs 9.5 oz
Ticalla Jungle
Weight: 1 lb 0.2 oz
SMALL EXPANSIONS
Flagbearers
Jandar
Weight: 5.0 oz
Utgar
Weight: 5.1 oz
Ullar
Weight: 5.1 oz
Vydar
Weight: 5.3 oz
Einar
Weight: 5.1 oz
Wave 1
Heroes
Weight: 5.7 oz - Heaviest booster so far
Orcs
Weight: 4.6 oz - First to weigh under 5 oz
Romans
Weight: 5.1 oz
Snipers & Vipers
Weight: 5.1 oz
Wave 2
Heroes
Weight: 5.6 oz
Wolves & Minutemen
Weight: 4.2 oz
Minions & Drones
Weight: 4.5 oz
Knights & Swog
Weight: 4.2 oz
Wave 3 First wave with all boosters under 5 oz
Heroes
Weight: 4.5 oz
Gorillas & Hounds
Weight: 4.8 oz
Monks & Sentinels
Weight: 4.7 oz
Kilts & Commandos
Weight: 4.2 oz
Wave 4
Heroes
Weight: 4.7 oz
Samurai & Lawmen
Weight: 4.3 oz
Greeks & Vipers
Weight: 4.5 oz
Soulborgs & Elves
Weight: 4.3 oz
Wave 5
Gladiators & Agents
Weight: 4.1 oz
Ninjas & Samurai
Weight: 3.9 oz - First to weigh under 4 oz
Warriors & Soulborgs
Weight: 4.2 oz
Soulborgs
Weight: 5.0 oz - Last to weigh 5 oz or more
Wave 6
Heroes
Weight: 4.4 oz
Shades & Orcs
Weight: 4.3 oz
Archers & Kyrie
Weight: 4.3 oz
Zombies
Weight: 3.7 oz
Wave 7
Heroes
Weight: 4.2 oz
Vampires & Fiends
Weight: 4.1 oz
Templar
Weight: 4.2 oz
Ashigaru
Weight: 3.6 oz
Wave 8 First wave with all boosters under 4 oz
Heroes
Weight: 3.9 oz
Elves
Weight: 3.8 oz
Groks
Weight: 3.5 oz - Lightest booster so far
Soldiers & Wolves
Weight: 3.6 oz
GenCon Exclusives w/ Card
Nerak
Weight: 0.5 oz
Hawthorne
Weight: 0.3 oz
Woo
Weight: 0.2 oz
Skahen
Weight: someone will need to send me one 