Framework
Prioritization

T-Shirt Sizing

XS, S, M, L, XL relative size

Best for
estimating without precision
Time
15–30 min
Difficulty
Beginner

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T-Shirt Sizing diagramSchematic of the T-Shirt Sizing framework: XS, S, M, L, XL relative size.Relative sizeXSSMLXL
The T-Shirt Sizing diagram — XS, S, M, L, XL relative size.
Example

Sizing the Q1 epic backlog before sprint planning

T-shirt sizes assigned
  1. XS — Add new error message copy (≤ 1 day)
  2. S — Email notification preferences (≤ 1 week)
  3. M — Bulk import from CSV (1–2 weeks)
  4. L — Workspace settings redesign (3–4 weeks)
  5. XL — New billing system migration (≥ 1 quarter)

Related frameworks

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WSJF

Cost of delay ÷ job size

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RICE

Reach × Impact × Confidence ÷ Effort

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Story Mapping

User journey backbone with slices

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