Why does this simple iteration not work?

local shirts = {
	[1] = {
		Asset = 123456789;
		Name = "White T-Shirt";
		Price = 50;
	};
	[2] = {
		Asset = 987654321;
		Name = "Blue Jacket";
		Price = 120;
	};
}

for _,top in ipairs(shirts) do
	for k,prop in ipairs(top) do
		print(k.."="..prop)
	end
end

Nothing to say, really.