I would say this would fit a modern 2-6. I wear a US 4 and it fits me. Tag says "P" but this also fits any height as I'm 5'9''. Length from HPS to hem is 33.5'.
Bright Pink classic pucci print with logos. The item "VTG Emilio Pucci for Formfit Rogers neon Mini Slip dress 60s 70s P Small" is in sale since Wednesday, September 28, 2016. This item is in the category "Clothing, Shoes & Accessories\Vintage\Women's Vintage Clothing\Lingerie\Slips & Petticoats". The seller is "beijafleur" and is located in Venice, California. This item can be shipped to United States, to Canada, to United Kingdom, DK, RO, SK, BG, CZ, FI, HU, LV, LT, MT, EE, to Australia, GR, PT, CY, SI, to Japan, to China, SE, KR, ID, to Taiwan, ZA, TH, to Belgium, to France, to Hong Kong, to Ireland, to Netherlands, PL, to Spain, to Italy, to Germany, to Austria, RU, IL, to Mexico, to New Zealand, PH, SG, to Switzerland, NO, SA, UA, AE, QA, KW, BH, HR, MY, BR, CL, CO, CR, DO, PA, TT, GT, SV, HN, JM, AG, AW, BZ, DM, GD, KN, LC, MS, TC, BB, BD, BM, BN, BO, EC, EG, GF, GG, GI, GP, IS, JE, JO, KH, KY, LI, LK, LU, MC, MO, MQ, MV, NI, OM, PE, PK, PY, RE.