diff --git a/vskernels/kernels/abstract.py b/vskernels/kernels/abstract.py
index 0acd50a..09eb9c3 100644
--- a/vskernels/kernels/abstract.py
+++ b/vskernels/kernels/abstract.py
@@ -19,6 +19,18 @@
 ]
 
 
+def _default_kernel_size(cls, self) -> int:
+    if hasattr(self, '_static_kernel_size'):
+        return ceil(self._static_kernel_size)
+
+    try:
+        return super(cls, self).kernel_size
+    except AttributeError:
+        ...
+
+    raise NotImplementedError
+
+
 class BaseScaler:
     @staticmethod
     def from_param(
@@ -122,10 +134,7 @@ def multi(
 
     @inject_self.property
     def kernel_size(self) -> int:
-        try:
-            super().kernel_size
-        except AttributeError:
-            raise NotImplementedError
+        return _default_kernel_size(__class__, self)
 
 
 class Descaler(vs_object):
@@ -174,10 +183,7 @@ def ensure_obj(
 
     @inject_self.property
     def kernel_size(self) -> int:
-        try:
-            super().kernel_size
-        except AttributeError:
-            raise NotImplementedError
+        return _default_kernel_size(__class__, self)
 
 
 class Resampler(vs_object):
@@ -202,10 +208,7 @@ def ensure_obj(
 
     @inject_self.property
     def kernel_size(self) -> int:
-        try:
-            super().kernel_size
-        except AttributeError:
-            raise NotImplementedError
+        return _default_kernel_size(__class__, self)
 
 
 class Kernel(Scaler, Descaler, Resampler):
diff --git a/vskernels/kernels/resize.py b/vskernels/kernels/resize.py
index f2c0018..b446b1b 100644
--- a/vskernels/kernels/resize.py
+++ b/vskernels/kernels/resize.py
@@ -18,10 +18,7 @@ class Point(ZimgComplexKernel):
     """Built-in point resizer."""
 
     scale_function = resample_function = descale_function = core.lazy.resize.Point
-
-    @inject_self.property
-    def kernel_size(self) -> int:
-        return 1
+    _static_kernel_size = 1
 
 
 class Bilinear(ZimgComplexKernel):
@@ -29,10 +26,7 @@ class Bilinear(ZimgComplexKernel):
 
     scale_function = resample_function = core.lazy.resize.Bilinear
     descale_function = core.lazy.descale.Debilinear
-
-    @inject_self.property
-    def kernel_size(self) -> int:
-        return 1
+    _static_kernel_size = 1
 
 
 class Lanczos(ZimgComplexKernel):
diff --git a/vskernels/kernels/spline.py b/vskernels/kernels/spline.py
index cf1e4cd..f768922 100644
--- a/vskernels/kernels/spline.py
+++ b/vskernels/kernels/spline.py
@@ -2,7 +2,7 @@
 
 from typing import Any
 
-from vstools import core, inject_self
+from vstools import core
 
 from .fmtconv import FmtConv
 from .zimg import ZimgComplexKernel
@@ -35,10 +35,7 @@ class Spline16(ZimgComplexKernel):
 
     scale_function = resample_function = core.lazy.resize.Spline16
     descale_function = core.lazy.descale.Despline16
-
-    @inject_self.property
-    def kernel_size(self) -> int:
-        return 2
+    _static_kernel_size = 2
 
 
 class Spline36(ZimgComplexKernel):
@@ -52,10 +49,7 @@ class Spline36(ZimgComplexKernel):
 
     scale_function = resample_function = core.lazy.resize.Spline36
     descale_function = core.lazy.descale.Despline36
-
-    @inject_self.property
-    def kernel_size(self) -> int:
-        return 3
+    _static_kernel_size = 3
 
 
 class Spline64(ZimgComplexKernel):
@@ -69,7 +63,4 @@ class Spline64(ZimgComplexKernel):
 
     scale_function = resample_function = core.lazy.resize.Spline64
     descale_function = core.lazy.descale.Despline64
-
-    @inject_self.property
-    def kernel_size(self) -> int:
-        return 4
+    _static_kernel_size = 4