An extant men's ensemble from c. 1833: coat and trousers of British make (Metropolitan Museum of Art collection).
Handbook of English Costume in the 19th Century, by Phillis and C. Willett Cunnington, describes the men's suit of the 1830s:
The tail coat was double-breasted or single-breasted; the cut-in now square; the collar high behind with rolled lapels turning low for full evening dress. The waist was rather short (until 1836) and the skirt at first scanty — ‘scarcely perceptible’ (1831.) — but becoming fuller and longer by 1838. The corners were rounded.
The sleeves, long and close-fitting, ceased to be gathered at the shoulders soon after 1832 although slight gathers sometimes persisted into the 1840s. The cuffs were usually slit (the French riding cuff) with two buttons in the cuff and sometimes two above; the corners of the cuff, from 1838, might be rounded off.
A fashion plate detail from 1834 (Met collection) showing a similar style of double-breasted tailcoat on the man at right, also paired with pleated Cossack-style trousers with foot straps.