Each prize occupies a ticket interval
With Sticker, Mug, T-shirt, and Book entered once, each prize has a 1/4 chance. The selection is uniform over prize labels; it does not account for their prices, quantities, or whether the same person may win again. Inventory is an input to the rule, not a fact the wheel can discover.
A four-prize draw
Suppose one of each prize is available for a participant. Before spinning, the chance of the Book is 25%. If the Book is selected and awarded, it should be removed before the next draw because its stock is now zero. Leaving it visible can promise a prize that no longer exists.
Publish eligibility and stock
Check who may enter, whether a prize can be exchanged, and what happens if a winner is absent. A duplicate Mug line gives it two of five sectors and a 40% chance, which is legitimate only when it represents two actual units or a disclosed weighting.
Not a legal promotion system
This page does not create contest rules, verify ages, handle tax reporting, or meet local promotion requirements. Use it for informal giveaways after those obligations are addressed.
Separate drawing from delivery
A transparent prize result should be followed by a simple fulfilment record: winner identifier, selected item, stock confirmation, and handover date. That is especially useful when multiple identical items exist, because two Mug labels may represent two real units rather than an accidental duplicate. Random selection chooses a claim; inventory handling proves that the claim can actually be honoured.
Multiple winners require a removal rule
A fundraiser with ten numbered entrants and three different prizes should decide whether a winner remains eligible before the first name is drawn. With removal, the second draw uses nine entrants and cannot repeat the first winner; without removal, repeated wins are permitted. Both can be valid, but the probability model and participant expectations differ. Publish the rule alongside the prize list.
Before awarding anything
Match every visible prize name to an item that can be delivered, and decide whether winners are eligible again. A clear inventory list prevents a celebratory draw from becoming a fulfilment dispute.
Result record
Pair the selected prize with a delivery confirmation so the random outcome and the promised item remain linked.