2 × 7 (smallest rectangle)

11 × 49

13 × 35

19 × 21 (smallest odd rectangle)

complete

smallest rectangle: 2 × 7

smallest odd rectangle: 19 × 21

The smallest odd rectangle was given by Marshall [1, Figure 13].

**Reference**

[1] William Rex Marshall,
Packing
Rectangles with Congruent Polyominoes,
*Journal of Combinatorial Theory, Series A* **77** (1997),
no. 2, pp. 181-192.

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Updated August 25, 2011.