{"reviewed":"November 2026","units":"cm","scope":"Original dimensional analysis with explicitly bounded examples. Room measurements and handling allocations are illustrative; positive differences are not approval of support, movement, installation or load.","rounding":"Calculations use unrounded inputs. Displayed results are rounded to two decimal places where necessary.","title":"Wrapping-roll length and withdrawal analysis","route":"/store-wrapping-paper-under-the-bed/","download":"/data/wrapping-paper-analysis.json","products":[{"id":"really-useful-22-clear-two","model":"Clear · 22 L · Two boxes","external":null,"source":"https://reallyusefulproducts.co.uk/uk/html/onlineshop/rub/b22_0litre.php","amazon":"https://www.amazon.co.uk/dp/B0DS6C6Z6S"},{"id":"brantmaker-red-wrapping-case","model":"Red · Without fibre rods · Single case","external":null,"source":"https://www.amazon.co.uk/dp/B09KRP83GJ","amazon":"https://www.amazon.co.uk/dp/B09KRP83GJ"}],"sources":[{"label":"Really Useful 22L internal and external dimensions","url":"https://reallyusefulproducts.co.uk/uk/html/onlineshop/rub/b22_0litre.php"},{"label":"Existing exact BRANTMAKER red case Amazon UK listing","url":"https://www.amazon.co.uk/dp/B09KRP83GJ"}],"formulas":["Inches to centimetres = inches × 2.54.","Straight length difference = minimum inside case length − complete roll length including tube and caps.","At a chosen plan angle θ, rectangular bounds are L cos θ + D sin θ across and L sin θ + D cos θ front to back.","Full straight withdrawal distance = complete outside case dimension front to back, with its front initially flush with the bed edge."],"assumptions":["Really Useful 22L dimensions: approximate outside maxima including lid and handles 80 × 25.5 × 15.5 cm; minimum inside dimensions 75 × 21 × 14 cm. Each pack contains two of that box.","The 70, 75, 76.2 and 100 cm complete roll lengths are comparison inputs, not paper-maker product claims. Thirty inches converts exactly to 76.2 cm; any projecting tube or caps must be included.","The 5 cm roll diameter and 12° plan angle are illustrative. This single-angle comparison does not prove or disprove every diagonal route. Rounded corners, taper and access are additional constraints.","The 90 × 85 × 18 cm bed bay, 85 cm opening and 40 cm clear withdrawal distance are illustrative. The front starts flush and movement is straight, with no supports or changing height along the route.","The BRANTMAKER catalogue gives approximately 102.9 × 35.5 × 15.2 cm outside and a seller-stated roll limit of 101.6 cm, not a verified minimum internal rectangular base. It is not substituted for the rigid box in the scenarios.","Positive differences do not establish grip room, lid opening, loaded soft-case shape or a complete retrieval route."],"rigid":{"external":[80,25.5,15.5],"internal":[75,21,14]},"lengths":[{"length":70,"difference":5},{"length":75,"difference":0},{"length":76.2,"difference":-1.2},{"length":100,"difference":-25}],"diagonal":77.88,"angle":{"degrees":12,"length":76.2,"diameter":5,"across":75.57,"depth":20.73},"routes":[{"turned":false,"result":{"across":80,"depth":25.5,"height":15.5,"remaining":[10,59.5,2.5],"staticWithin":true,"lift":0,"raisedHeight":15.5,"raisedRemaining":2.5,"withdrawal":25.5},"openingDifference":5,"withdrawalDifference":14.5},{"turned":true,"result":{"across":25.5,"depth":80,"height":15.5,"remaining":[64.5,5,2.5],"staticWithin":true,"lift":0,"raisedHeight":15.5,"raisedRemaining":2.5,"withdrawal":80},"openingDifference":59.5,"withdrawalDifference":-40}]}