The Sind sparrow is very similar to the house sparrow, and both sexes resemble their counterparts of that species, but it is slightly smaller and males and females each have features that distinguish them as Sind sparrows. The Sind sparrow is 13 cm (5.1 in) long, while the common South Asian subspecies of the house sparrow, Passer domesticus indicus, is about 15 cm (5.9 in) long. Wingspans range from 6.2 to 7.0 cm (2.4 to 2.8 in), tails from 4.7 to 5.7 cm (1.9 to 2.2 in), and tarsi measure 1.6–1.9 centimetres (0.63–0.75 in).
The breeding male has a short and narrow black bib and a broad chestnut eye stripe that does not meet the mantle. The male has a grey crown and nape and a rufous lower back and rump. The female has a darker and greyer crown and cheek than the female house sparrow and the shoulder is darker chestnut. The female Dead Sea sparrow of the subspecies Passer moabiticus yattii is also similar to the female Sind sparrow, but has yellow tinges on the underparts and sometimes on parts of the head. The bill is black on the breeding male and pale brown on the non-breeding male and female. With a culmen length of 1.1–1.3 centimetres (0.43–0.51 in), the Sind sparrow is slightly smaller-billed than the house sparrow.
The Sind sparrow's chirping chup call is softer, less strident, and higher pitched than that of the house sparrow, and is easily