Anna Kostkowska

Anna Kostkowska

Born in Cracow, Poland on November 19, 1999, Anna Kostkowska is a glamour and general model who has built her presence across both traditional modeling and content creation platforms. She operates primarily under the alias ianmarbb across her social media and subscription channels.

Career Overview

Anna works within the glamour modeling space, producing content independently rather than through major studio affiliations. Her approach is typical of the post-2020 wave of European models who have used direct-to-audience platforms to establish and maintain careers without relying on traditional agency pipelines.

She maintains a presence on OnlyFans and Patreon, which together form the core of her content distribution. The dual-platform approach is common among models of her generation, allowing for tiered content delivery to different audience segments.

Background and Physical Profile

Anna was raised in Cracow, in the Lesser Poland region, and her Polish background places her among a growing number of Polish Models who have entered the independent content space over the past several years.

She stands at 5'10" (177 cm) with a slim build and brown hair and eyes. Her measurements are listed at 32-26-38 with a 32C bra size and natural bust. Her height is notable within the glamour modeling category, where taller frames are less common among independent creators, and she appears on the Tall Models list as a result.

Platform Presence

Anna uses the alias ianmarbb consistently across platforms including TikTok, Instagram, and X (formerly Twitter), maintaining a unified online identity. Her Patreon account is registered under her full name, Anna Kostkowska, which suggests a degree of personal branding alongside the alias-based accounts.

She does not appear to have formal credits with named adult studios or production houses based on available data, indicating her work is largely self-produced and self-distributed.

Industry Context

At 26, Anna sits in the mid-career range for independent glamour models who entered the space in the early-to-mid 2020s. Her profile reflects the broader shift in the industry toward creator-owned content, where models from Central and Eastern Europe have established direct channels to their audiences without the intermediary of regional or international studios. Her natural bust and lean build are consistent with the Natural Boobs category on record.