There is no single size letter that can settle the fit of every product in a HipoBuy spreadsheet. Start with the chart attached to the exact listing and compare it with something you already wear comfortably. The useful question is not simply whether you usually buy medium, but whether the chosen garment has the shape and dimensions you need.
Keep this comparison with the selected option. The link guide explains why reopening a product address may not preserve the size previously selected.
Identify what the chart measures
Read the column labels and any diagram before comparing numbers. A chart may describe the garment or the wearer's body. Flat width and circumference are different measurements, even when both appear under a chest or waist heading.
Use the same units and method on both sides of the comparison. If a chart is unclear, ask which measurement it describes rather than choosing the interpretation that makes your usual size appear suitable. For unit conversion, one inch equals 2.54 centimetres; conversion changes the unit, not the measurement method.
Choose a reference garment for the intended fit
Lay a comparable garment flat without stretching it and follow the method shown by the listing where possible. A fitted base layer is a poor reference for a loose outer layer unless you deliberately account for the different fit you want.
For tops, compare more than chest width. Length affects where the hem sits; sleeve length and shoulder construction affect how the upper body looks and moves. A dropped-shoulder design can make a shoulder number mean something different from a conventional set-in sleeve. If the diagrams use different endpoints, do not treat the figures as directly interchangeable.
You can examine the Polo Bear crewneck sweater on OG as a candidate to compare with a sweater you own. Its product title does not establish stretch, shrinkage or measurements. Use the current listing details and your chosen option rather than filling those properties in from appearance.
Trousers need more than waist width
For trousers or shorts, consider waist, rise and leg length together. A waistband that appears suitable does not establish that the garment sits where you want it to. Compare the rise and the position of the waistband with your reference garment.
Check whether the stated length is an inseam or an outside length. They are not alternative names for the same measurement. For an elastic waistband, establish whether a listed figure is relaxed or stretched before comparing it with a fixed waistband.
Do not assume that a stretch description guarantees a comfortable range. Ask about the specific measurement if that detail determines whether the product is usable for you.
Treat shoes as their own comparison
A clothing-size habit does not help choose a shoe size. Read the relevant footwear chart and identify whether the length refers to the foot, insole or another measurement. Those values should not be silently substituted for one another.
Width and intended use can matter as well as length. A chart may narrow your choice without guaranteeing comfort. Do not infer a universal EU-to-US conversion for all listings from one previous purchase; use the chart associated with the actual model and option.
Ask for a measurement that can be checked
If you request a measurement, name the part and its endpoints. For example, ask for the flat width across the garment at the indicated chest position rather than just asking whether it is true to size. This creates an answer you can compare with your reference.
When a photo includes a ruler or tape, check that its start and end are visible and that the garment is positioned consistently. Perspective, folds or tension can make a number difficult to interpret. The QC photo guide explains how to seek a clearer image without treating an unclear photo as a precise reading.
An inspection image should match your own selected item. Another buyer's measurement may provide context, but it is not a measurement of your purchase.
Decide before the uncertainty becomes a return question
Resolve essential fit questions before paying where possible. If an important discrepancy appears later, ask about that item before authorising onward shipment. A general size recommendation does not establish return eligibility or who pays associated costs.
The returns guide separates those questions from storage. Use the shopping walkthrough to keep the selected size, payment and later parcel decisions in sequence.
FAQ
Should I always size up when using HipoBuy?
No universal rule follows from the platform name. Compare the specific chart, garment construction and desired fit instead of automatically adding a size.
Can I double a flat width to compare it with a circumference?
Only after confirming that the measurements refer to the same part and method. Doubling a width does not resolve differences between body and garment measurements or between measurement positions.
Does oversized mean the same thing across products?
No. It is a description, not a complete set of dimensions. Check width, length and construction to understand the actual silhouette.
Is another buyer's height and weight enough to select my size?
Not reliably. Body proportions, preferred fit and the exact item can differ. A comparable garment and clearly defined measurements provide a more direct basis for your choice.