When I visited Rome a couple of months ago, I spent a couple of hours wandering in the neighborhood in front of the Spanish Steps along via Babuino, Margutta, Frattina and Condotti.
On via Belsiana, I noticed a small shirtmaking shop called Jaja Shirts and stepped inside. There I chatted with the proprietor Giuseppe Rossi, who described their workshop, history and offering. Bespoke shirts start at 180 euros. The first shirt requires one fitting (which is possible to do the following day) and is then finished in 20 days.
They carry shirtings by Riva (Rossi showed some very nice voiles and softer lighter Oxford shirtings), Reiser and Bonfanti. His Roman clients order plenty of voile, which he noted should be hand washed. The shirts feature hand sewn buttonholes and, as an option, extremely fine hand embroidery of the owner's initials (monogramming).
They also make custom pajamas for 160 euros. Rossi said he took over the business from his parents and that they've been in the same location for 40 years.
Via Belsiana 7a
Tel +39 06 679 2160