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Introduction Intrasaccular devices such as the Woven EndoBridge (WEB) have proven to be safe and effective for the treatment of intracranial aneurysms. However, optimal sizing remains a matter of debate.Aim of study This study evaluates the feasibility of a simplified sizing strategy using a ‘shallow’ WEB device for the treatment of intracranial ruptured and unruptured aneurysms.Method This single-center retrospective study included patients treated with a shallow WEB device between March 2015 and August 2024. A shallow WEB was defined as a device with the smallest available height for a given width, and a dome-to-WEB height ratio greater than 1.5. Anatomic results were assessed by digital subtraction angiography (DSA) immediately post-procedure, at 6 months, and at 1 year. Occlusion rates were compared between ruptured and unruptured aneurysms, and statistical differences between groups were evaluated using the chi-square test.Results 90 patients with 93 aneurysms were treated with a shallow WEB device. Of these, seventy-nine had 1-year DSA follow-up, and twelve had 6-month DSA follow-up. 33 aneurysms (35.5%) were ruptured, and 60 aneurysms (64.5%) were unruptured. At final DSA, complete aneurysm occlusion (WOS A+B) was achieved in sixty-sever aneurysms (72%), neck remnants (WOS C) were observed in twenty-one aneurysms (22.6%), and aneurysm remnants (WOS D) in five aneurysms (5.4%). Complete occlusion was more frequent in ruptured aneurysms (78.8%) though the difference was not statistically significant (p-value = 0.40461).Abstract A282 Figure 1A and B: DSA and 3D of PCOM Aneurysm (4.5 mm mean diameter x 6.2 mm height x 3.1 mm neck). C and D: Deployment of a shallow WEB SL 5 x 3 mmConclusion This study introduces the novel concept of the ‘shallow’ WEB and demonstrates its safety and effectiveness in the treatment of saccular aneurysms.Conflict of Interest No